thodg/libgit2

diff --git a/include/git2/reset.h b/include/git2/reset.h
index 4a34077..93ac0b2 100644
--- a/include/git2/reset.h
+++ b/include/git2/reset.h
@@ -56,20 +56,13 @@ typedef enum {
  * The checkout_strategy field will be overridden (based on reset_type).
  * This parameter can be used to propagate notify and progress callbacks.
  *
- *
- * @param log_message The one line long message to be appended to the reflog.
- * The reflog is only updated if the affected direct reference is actually
- * changing. If NULL, the default is "reset: moving"; if you want something more
- * useful, provide a message.
- *
  * @return 0 on success or an error code
  */
 GIT_EXTERN(int) git_reset(
 	git_repository *repo,
 	git_object *target,
 	git_reset_t reset_type,
-	git_checkout_options *checkout_opts,
-	const char *log_message);
+	git_checkout_options *checkout_opts);
 
 /**
  * Updates some entries in the index from the target commit tree.
diff --git a/src/rebase.c b/src/rebase.c
index 2013f53..43945df 100644
--- a/src/rebase.c
+++ b/src/rebase.c
@@ -971,7 +971,7 @@ int git_rebase_abort(git_rebase *rebase)
 	if ((error = git_commit_lookup(
 			&orig_head_commit, rebase->repo, &rebase->orig_head_id)) < 0 ||
 		(error = git_reset(rebase->repo, (git_object *)orig_head_commit,
-			GIT_RESET_HARD, NULL, NULL)) < 0)
+			GIT_RESET_HARD, NULL)) < 0)
 		goto done;
 
 	error = rebase_cleanup(rebase);
diff --git a/src/reset.c b/src/reset.c
index bf8bbcc..f42a0b3 100644
--- a/src/reset.c
+++ b/src/reset.c
@@ -100,15 +100,14 @@ int git_reset(
 	git_repository *repo,
 	git_object *target,
 	git_reset_t reset_type,
-	git_checkout_options *checkout_opts,
-	const char *log_message)
+	git_checkout_options *checkout_opts)
 {
 	git_object *commit = NULL;
 	git_index *index = NULL;
 	git_tree *tree = NULL;
 	int error = 0;
 	git_checkout_options opts = GIT_CHECKOUT_OPTIONS_INIT;
-	git_buf log_message_buf = GIT_BUF_INIT;
+	git_buf log_message = GIT_BUF_INIT;
 
 	assert(repo && target);
 
@@ -140,10 +139,8 @@ int git_reset(
 		goto cleanup;
 	}
 
-	if (log_message)
-		git_buf_sets(&log_message_buf, log_message);
-	else
-		git_buf_sets(&log_message_buf, "reset: moving");
+	if ((error = git_buf_printf(&log_message, "reset: moving to %s", git_oid_tostr_s(git_object_id(commit)))) < 0)
+		return error;
 
 	/* move HEAD to the new target */
 	if ((error = git_reference__update_terminal(repo, GIT_HEAD_FILE,
@@ -175,7 +172,7 @@ cleanup:
 	git_object_free(commit);
 	git_index_free(index);
 	git_tree_free(tree);
-	git_buf_free(&log_message_buf);
+	git_buf_free(&log_message);
 
 	return error;
 }
diff --git a/tests/checkout/tree.c b/tests/checkout/tree.c
index 982eaf6..97ef22b 100644
--- a/tests/checkout/tree.c
+++ b/tests/checkout/tree.c
@@ -572,7 +572,7 @@ void test_checkout_tree__donot_update_deleted_file_by_default(void)
 
 	cl_git_pass(git_oid_fromstr(&old_id, "be3563ae3f795b2b4353bcce3a527ad0a4f7f644"));
 	cl_git_pass(git_commit_lookup(&old_commit, g_repo, &old_id));
-	cl_git_pass(git_reset(g_repo, (git_object *)old_commit, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(g_repo, (git_object *)old_commit, GIT_RESET_HARD, NULL));
 
 	cl_git_pass(p_unlink("testrepo/branch_file.txt"));
 	cl_git_pass(git_index_remove_bypath(index ,"branch_file.txt"));
diff --git a/tests/cherrypick/workdir.c b/tests/cherrypick/workdir.c
index feacde3..f8b4ca2 100644
--- a/tests/cherrypick/workdir.c
+++ b/tests/cherrypick/workdir.c
@@ -66,7 +66,7 @@ void test_cherrypick_workdir__automerge(void)
 		git_tree *cherrypicked_tree = NULL;
 
 		cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-		cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+		cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 		git_oid_fromstr(&cherry_oid, cherrypick_oids[i]);
 		cl_git_pass(git_commit_lookup(&commit, repo, &cherry_oid));
@@ -118,7 +118,7 @@ void test_cherrypick_workdir__empty_result(void)
 	cl_assert(git_path_exists(TEST_REPO_PATH "/file4.txt"));
 
 	cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	git_oid_fromstr(&cherry_oid, cherrypick_oid);
 	cl_git_pass(git_commit_lookup(&commit, repo, &cherry_oid));
@@ -155,7 +155,7 @@ void test_cherrypick_workdir__conflicts(void)
 	git_oid_fromstr(&head_oid, "bafbf6912c09505ac60575cd43d3f2aba3bd84d8");
 
 	cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	git_oid_fromstr(&cherry_oid, "e9b63f3655b2ad80c0ff587389b5a9589a3a7110");
 	cl_git_pass(git_commit_lookup(&commit, repo, &cherry_oid));
@@ -263,7 +263,7 @@ void test_cherrypick_workdir__conflict_use_ours(void)
 	git_oid_fromstr(&head_oid, "bafbf6912c09505ac60575cd43d3f2aba3bd84d8");
 
 	cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	git_oid_fromstr(&cherry_oid, "e9b63f3655b2ad80c0ff587389b5a9589a3a7110");
 	cl_git_pass(git_commit_lookup(&commit, repo, &cherry_oid));
@@ -275,7 +275,7 @@ void test_cherrypick_workdir__conflict_use_ours(void)
 	/* resolve conflicts in the index by taking "ours" */
 	opts.merge_opts.file_favor = GIT_MERGE_FILE_FAVOR_OURS;
 
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 	cl_git_pass(git_cherrypick(repo, commit, &opts));
 
 	cl_assert(merge_test_index(repo_index, merge_filesystem_entries, 3));
@@ -305,7 +305,7 @@ void test_cherrypick_workdir__rename(void)
 
 	git_oid_fromstr(&head_oid, "cfc4f0999a8367568e049af4f72e452d40828a15");
 	cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	git_oid_fromstr(&cherry_oid, "2a26c7e88b285613b302ba76712bc998863f3cbc");
 	cl_git_pass(git_commit_lookup(&commit, repo, &cherry_oid));
@@ -340,7 +340,7 @@ void test_cherrypick_workdir__both_renamed(void)
 
 	git_oid_fromstr(&head_oid, "44cd2ed2052c9c68f9a439d208e9614dc2a55c70");
 	cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	git_oid_fromstr(&cherry_oid, "2a26c7e88b285613b302ba76712bc998863f3cbc");
 	cl_git_pass(git_commit_lookup(&commit, repo, &cherry_oid));
@@ -391,7 +391,7 @@ void test_cherrypick_workdir__merge_fails_without_mainline_specified(void)
 
 	git_oid_fromstr(&head_oid, "cfc4f0999a8367568e049af4f72e452d40828a15");
 	cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	git_oid_fromstr(&cherry_oid, "abe4603bc7cd5b8167a267e0e2418fd2348f8cff");
 	cl_git_pass(git_commit_lookup(&commit, repo, &cherry_oid));
@@ -423,7 +423,7 @@ void test_cherrypick_workdir__merge_first_parent(void)
 
 	git_oid_fromstr(&head_oid, "cfc4f0999a8367568e049af4f72e452d40828a15");
 	cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	git_oid_fromstr(&cherry_oid, "abe4603bc7cd5b8167a267e0e2418fd2348f8cff");
 	cl_git_pass(git_commit_lookup(&commit, repo, &cherry_oid));
@@ -455,7 +455,7 @@ void test_cherrypick_workdir__merge_second_parent(void)
 
 	git_oid_fromstr(&head_oid, "cfc4f0999a8367568e049af4f72e452d40828a15");
 	cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	git_oid_fromstr(&cherry_oid, "abe4603bc7cd5b8167a267e0e2418fd2348f8cff");
 	cl_git_pass(git_commit_lookup(&commit, repo, &cherry_oid));
diff --git a/tests/index/names.c b/tests/index/names.c
index 52922e9..d462088 100644
--- a/tests/index/names.c
+++ b/tests/index/names.c
@@ -89,7 +89,7 @@ void test_index_names__cleaned_on_reset_hard(void)
 	cl_git_pass(git_revparse_single(&target, repo, "3a34580"));
 
 	test_index_names__add();
-	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL));
 	cl_assert(git_index_name_entrycount(repo_index) == 0);
 
 	git_object_free(target);
@@ -102,7 +102,7 @@ void test_index_names__cleaned_on_reset_mixed(void)
 	cl_git_pass(git_revparse_single(&target, repo, "3a34580"));
 
 	test_index_names__add();
-	cl_git_pass(git_reset(repo, target, GIT_RESET_MIXED, NULL, NULL));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_MIXED, NULL));
 	cl_assert(git_index_name_entrycount(repo_index) == 0);
 
 	git_object_free(target);
diff --git a/tests/index/reuc.c b/tests/index/reuc.c
index 0b4d71a..e57facc 100644
--- a/tests/index/reuc.c
+++ b/tests/index/reuc.c
@@ -298,7 +298,7 @@ void test_index_reuc__cleaned_on_reset_hard(void)
 	cl_git_pass(git_revparse_single(&target, repo, "3a34580"));
 
 	test_index_reuc__add();
-	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL));
 	cl_assert(reuc_entry_exists() == false);
 
 	git_object_free(target);
@@ -311,7 +311,7 @@ void test_index_reuc__cleaned_on_reset_mixed(void)
 	cl_git_pass(git_revparse_single(&target, repo, "3a34580"));
 
 	test_index_reuc__add();
-	cl_git_pass(git_reset(repo, target, GIT_RESET_MIXED, NULL, NULL));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_MIXED, NULL));
 	cl_assert(reuc_entry_exists() == false);
 
 	git_object_free(target);
@@ -323,10 +323,10 @@ void test_index_reuc__retained_on_reset_soft(void)
 
 	cl_git_pass(git_revparse_single(&target, repo, "3a34580"));
 
-	git_reset(repo, target, GIT_RESET_HARD, NULL, NULL);
+	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL));
 
 	test_index_reuc__add();
-	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT, NULL, NULL));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT, NULL));
 	cl_assert(reuc_entry_exists() == true);
 
 	git_object_free(target);
diff --git a/tests/merge/workdir/dirty.c b/tests/merge/workdir/dirty.c
index 0748b07..b66225d 100644
--- a/tests/merge/workdir/dirty.c
+++ b/tests/merge/workdir/dirty.c
@@ -182,7 +182,7 @@ static void stage_content(char *content[])
 
 	cl_git_pass(git_repository_head(&head, repo));
 	cl_git_pass(git_reference_peel(&head_object, head, GIT_OBJ_COMMIT));
-	cl_git_pass(git_reset(repo, head_object, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, head_object, GIT_RESET_HARD, NULL));
 
 	for (i = 0, filename = content[i], text = content[++i];
 		filename && text;
@@ -209,7 +209,7 @@ static int merge_dirty_files(char *dirty_files[])
 
 	cl_git_pass(git_repository_head(&head, repo));
 	cl_git_pass(git_reference_peel(&head_object, head, GIT_OBJ_COMMIT));
-	cl_git_pass(git_reset(repo, head_object, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, head_object, GIT_RESET_HARD, NULL));
 
 	write_files(dirty_files);
 
@@ -229,7 +229,7 @@ static int merge_differently_filtered_files(char *files[])
 
 	cl_git_pass(git_repository_head(&head, repo));
 	cl_git_pass(git_reference_peel(&head_object, head, GIT_OBJ_COMMIT));
-	cl_git_pass(git_reset(repo, head_object, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, head_object, GIT_RESET_HARD, NULL));
 
 	write_files(files);
 	hack_index(files);
@@ -266,7 +266,7 @@ void test_merge_workdir_dirty__unstaged_deletes_maintained(void)
 
 	cl_git_pass(git_repository_head(&head, repo));
 	cl_git_pass(git_reference_peel(&head_object, head, GIT_OBJ_COMMIT));
-	cl_git_pass(git_reset(repo, head_object, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, head_object, GIT_RESET_HARD, NULL));
 
 	cl_git_pass(p_unlink("merge-resolve/unchanged.txt"));
 
diff --git a/tests/merge/workdir/simple.c b/tests/merge/workdir/simple.c
index 00bc475..abc0777 100644
--- a/tests/merge/workdir/simple.c
+++ b/tests/merge/workdir/simple.c
@@ -524,7 +524,7 @@ void test_merge_workdir_simple__directory_file(void)
 	cl_git_pass(git_reference_symbolic_create(&head, repo, GIT_HEAD_FILE, GIT_REFS_HEADS_DIR OURS_DIRECTORY_FILE, 1, NULL));
 	cl_git_pass(git_reference_name_to_id(&head_commit_id, repo, GIT_HEAD_FILE));
 	cl_git_pass(git_commit_lookup(&head_commit, repo, &head_commit_id));
-	cl_git_pass(git_reset(repo, (git_object *)head_commit, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head_commit, GIT_RESET_HARD, NULL));
 
 	cl_git_pass(git_oid_fromstr(&their_oids[0], THEIRS_DIRECTORY_FILE));
 	cl_git_pass(git_annotated_commit_lookup(&their_heads[0], repo, &their_oids[0]));
@@ -616,7 +616,7 @@ void test_merge_workdir_simple__binary(void)
 	cl_git_pass(git_oid_fromstr(&their_oid, "ad01aebfdf2ac13145efafe3f9fcf798882f1730"));
 
 	cl_git_pass(git_commit_lookup(&our_commit, repo, &our_oid));
-	cl_git_pass(git_reset(repo, (git_object *)our_commit, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)our_commit, GIT_RESET_HARD, NULL));
 
 	cl_git_pass(git_annotated_commit_lookup(&their_head, repo, &their_oid));
 
diff --git a/tests/merge/workdir/submodules.c b/tests/merge/workdir/submodules.c
index 19c08b0..7c18c2f 100644
--- a/tests/merge/workdir/submodules.c
+++ b/tests/merge/workdir/submodules.c
@@ -44,7 +44,7 @@ void test_merge_workdir_submodules__automerge(void)
 
 	cl_git_pass(git_reference_lookup(&our_ref, repo, "refs/heads/" SUBMODULE_MAIN_BRANCH));
 	cl_git_pass(git_commit_lookup(&our_commit, repo, git_reference_target(our_ref)));
-	cl_git_pass(git_reset(repo, (git_object *)our_commit, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)our_commit, GIT_RESET_HARD, NULL));
 
 	cl_git_pass(git_reference_lookup(&their_ref, repo, "refs/heads/" SUBMODULE_OTHER_BRANCH));
 	cl_git_pass(git_annotated_commit_from_ref(&their_head, repo, their_ref));
@@ -77,7 +77,7 @@ void test_merge_workdir_submodules__take_changed(void)
 
 	cl_git_pass(git_reference_lookup(&our_ref, repo, "refs/heads/" SUBMODULE_MAIN_BRANCH));
 	cl_git_pass(git_commit_lookup(&our_commit, repo, git_reference_target(our_ref)));
-	cl_git_pass(git_reset(repo, (git_object *)our_commit, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)our_commit, GIT_RESET_HARD, NULL));
 
 	cl_git_pass(git_reference_lookup(&their_ref, repo, "refs/heads/" SUBMODULE_OTHER2_BRANCH));
 	cl_git_pass(git_annotated_commit_from_ref(&their_head, repo, their_ref));
diff --git a/tests/reset/hard.c b/tests/reset/hard.c
index c6bf7a8..f21ea9f 100644
--- a/tests/reset/hard.c
+++ b/tests/reset/hard.c
@@ -71,7 +71,7 @@ void test_reset_hard__resetting_reverts_modified_files(void)
 
 	cl_git_pass(git_revparse_single(&target, repo, "26a125e"));
 
-	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL));
 
 	for (i = 0; i < 4; ++i) {
 		cl_git_pass(git_buf_joinpath(&path, wd, files[i]));
@@ -96,7 +96,7 @@ void test_reset_hard__cannot_reset_in_a_bare_repository(void)
 
 	cl_git_pass(git_revparse_single(&target, bare, KNOWN_COMMIT_IN_BARE_REPO));
 
-	cl_assert_equal_i(GIT_EBAREREPO, git_reset(bare, target, GIT_RESET_HARD, NULL, NULL));
+	cl_assert_equal_i(GIT_EBAREREPO, git_reset(bare, target, GIT_RESET_HARD, NULL));
 
 	git_repository_free(bare);
 }
@@ -152,7 +152,7 @@ void test_reset_hard__resetting_reverts_unmerged(void)
 		cl_git_pass(git_index_write(index));
 
 		cl_git_pass(git_revparse_single(&target, repo, "26a125e"));
-		cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL, NULL));
+		cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL));
 
 		cl_assert(git_path_exists("status/conflicting_file") == 0);
 
@@ -183,7 +183,7 @@ void test_reset_hard__cleans_up_merge(void)
 	cl_git_mkfile(git_buf_cstr(&orig_head_path), "0017bd4ab1ec30440b17bae1680cff124ab5f1f6");
 
 	cl_git_pass(git_revparse_single(&target, repo, "0017bd4"));
-	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL));
 
 	cl_assert(!git_path_exists(git_buf_cstr(&merge_head_path)));
 	cl_assert(!git_path_exists(git_buf_cstr(&merge_msg_path)));
@@ -200,6 +200,7 @@ void test_reset_hard__cleans_up_merge(void)
 
 void test_reset_hard__reflog_is_correct(void)
 {
+	git_buf buf = GIT_BUF_INIT;
 	const char *exp_msg = "commit: Add a file which name should appear before the "
 		"\"subdir/\" folder while being dealt with by the treewalker";
 
@@ -208,25 +209,16 @@ void test_reset_hard__reflog_is_correct(void)
 
 	/* Branch not moving, no reflog entry */
 	cl_git_pass(git_revparse_single(&target, repo, "HEAD^{commit}"));
-	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL));
 	reflog_check(repo, "HEAD", 3, "emeric.fermas@gmail.com", exp_msg);
 	reflog_check(repo, "refs/heads/master", 3, "emeric.fermas@gmail.com", exp_msg);
 
 	git_object_free(target);
 
 	/* Moved branch, expect default message */
-	exp_msg = "reset: moving";
 	cl_git_pass(git_revparse_single(&target, repo, "HEAD~^{commit}"));
-	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL, NULL));
-	reflog_check(repo, "HEAD", 4, NULL, exp_msg);
-	reflog_check(repo, "refs/heads/master", 4, NULL, exp_msg);
-
-	git_object_free(target);
-
-	/* Moved branch, expect custom message */
-	exp_msg = "message1";
-	cl_git_pass(git_revparse_single(&target, repo, "HEAD~^{commit}"));
-	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL, "message1"));
-	reflog_check(repo, "HEAD", 5, NULL, exp_msg);
-	reflog_check(repo, "refs/heads/master", 5, NULL, exp_msg);
+	cl_git_pass(git_buf_printf(&buf, "reset: moving to %s", git_oid_tostr_s(git_object_id(target))));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL));
+	reflog_check(repo, "HEAD", 4, NULL, git_buf_cstr(&buf));
+	reflog_check(repo, "refs/heads/master", 4, NULL, git_buf_cstr(&buf));
 }
diff --git a/tests/reset/mixed.c b/tests/reset/mixed.c
index 55b8a2f..5b42ebc 100644
--- a/tests/reset/mixed.c
+++ b/tests/reset/mixed.c
@@ -29,7 +29,7 @@ void test_reset_mixed__cannot_reset_in_a_bare_repository(void)
 
 	cl_git_pass(git_revparse_single(&target, bare, KNOWN_COMMIT_IN_BARE_REPO));
 
-	cl_assert_equal_i(GIT_EBAREREPO, git_reset(bare, target, GIT_RESET_MIXED, NULL, NULL));
+	cl_assert_equal_i(GIT_EBAREREPO, git_reset(bare, target, GIT_RESET_MIXED, NULL));
 
 	git_repository_free(bare);
 }
@@ -42,7 +42,7 @@ void test_reset_mixed__resetting_refreshes_the_index_to_the_commit_tree(void)
 	cl_assert(status == GIT_STATUS_CURRENT);
 	cl_git_pass(git_revparse_single(&target, repo, "605812a"));
 
-	cl_git_pass(git_reset(repo, target, GIT_RESET_MIXED, NULL, NULL));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_MIXED, NULL));
 
 	cl_git_pass(git_status_file(&status, repo, "macro_bad"));
 	cl_assert(status == GIT_STATUS_WT_NEW);
@@ -50,6 +50,7 @@ void test_reset_mixed__resetting_refreshes_the_index_to_the_commit_tree(void)
 
 void test_reset_mixed__reflog_is_correct(void)
 {
+	git_buf buf = GIT_BUF_INIT;
 	const char *exp_msg = "commit: Updating test data so we can test inter-hunk-context";
 
 	reflog_check(repo, "HEAD", 9, "yoram.harmelin@gmail.com", exp_msg);
@@ -57,7 +58,7 @@ void test_reset_mixed__reflog_is_correct(void)
 
 	/* Branch not moving, no reflog entry */
 	cl_git_pass(git_revparse_single(&target, repo, "HEAD^{commit}"));
-	cl_git_pass(git_reset(repo, target, GIT_RESET_MIXED, NULL, NULL));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_MIXED, NULL));
 	reflog_check(repo, "HEAD", 9, "yoram.harmelin@gmail.com", exp_msg);
 	reflog_check(repo, "refs/heads/master", 9, "yoram.harmelin@gmail.com", exp_msg);
 
@@ -65,19 +66,10 @@ void test_reset_mixed__reflog_is_correct(void)
 	target = NULL;
 
 	/* Moved branch, expect default message */
-	exp_msg = "reset: moving";
 	cl_git_pass(git_revparse_single(&target, repo, "HEAD~^{commit}"));
-	cl_git_pass(git_reset(repo, target, GIT_RESET_MIXED, NULL, NULL));
-	reflog_check(repo, "HEAD", 10, NULL, exp_msg);
-	reflog_check(repo, "refs/heads/master", 10, NULL, exp_msg);
-
-	git_object_free(target);
-	target = NULL;
-
-	/* Moved branch, expect custom message */
-	exp_msg = "message1";
-	cl_git_pass(git_revparse_single(&target, repo, "HEAD~^{commit}"));
-	cl_git_pass(git_reset(repo, target, GIT_RESET_MIXED, NULL, "message1"));
-	reflog_check(repo, "HEAD", 11, NULL, exp_msg);
-	reflog_check(repo, "refs/heads/master", 11, NULL, exp_msg);
+	git_buf_clear(&buf);
+	cl_git_pass(git_buf_printf(&buf, "reset: moving to %s", git_oid_tostr_s(git_object_id(target))));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_MIXED, NULL));
+	reflog_check(repo, "HEAD", 10, NULL, git_buf_cstr(&buf));
+	reflog_check(repo, "refs/heads/master", 10, NULL, git_buf_cstr(&buf));
 }
diff --git a/tests/reset/soft.c b/tests/reset/soft.c
index 8408da7..f7ae59b 100644
--- a/tests/reset/soft.c
+++ b/tests/reset/soft.c
@@ -30,7 +30,7 @@ static void assert_reset_soft(bool should_be_detached)
 
 	cl_assert(git_repository_head_detached(repo) == should_be_detached);
 
-	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT, NULL, NULL));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT, NULL));
 
 	cl_assert(git_repository_head_detached(repo) == should_be_detached);
 
@@ -61,7 +61,7 @@ void test_reset_soft__resetting_to_the_commit_pointed_at_by_the_Head_does_not_ch
 
 	cl_git_pass(git_revparse_single(&target, repo, raw_head_oid));
 
-	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT, NULL, NULL));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT, NULL));
 
 	cl_git_pass(git_reference_name_to_id(&oid, repo, "HEAD"));
 	cl_git_pass(git_oid_streq(&oid, raw_head_oid));
@@ -74,7 +74,7 @@ void test_reset_soft__resetting_to_a_tag_sets_the_Head_to_the_peeled_commit(void
 	/* b25fa35 is a tag, pointing to another tag which points to commit e90810b */
 	cl_git_pass(git_revparse_single(&target, repo, "b25fa35"));
 
-	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT, NULL, NULL));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT, NULL));
 
 	cl_assert(git_repository_head_detached(repo) == false);
 	cl_git_pass(git_reference_name_to_id(&oid, repo, "HEAD"));
@@ -86,12 +86,12 @@ void test_reset_soft__cannot_reset_to_a_tag_not_pointing_at_a_commit(void)
 	/* 53fc32d is the tree of commit e90810b */
 	cl_git_pass(git_revparse_single(&target, repo, "53fc32d"));
 
-	cl_git_fail(git_reset(repo, target, GIT_RESET_SOFT, NULL, NULL));
+	cl_git_fail(git_reset(repo, target, GIT_RESET_SOFT, NULL));
 	git_object_free(target);
 
 	/* 521d87c is an annotated tag pointing to a blob */
 	cl_git_pass(git_revparse_single(&target, repo, "521d87c"));
-	cl_git_fail(git_reset(repo, target, GIT_RESET_SOFT, NULL, NULL));
+	cl_git_fail(git_reset(repo, target, GIT_RESET_SOFT, NULL));
 }
 
 void test_reset_soft__resetting_against_an_unborn_head_repo_makes_the_head_no_longer_unborn(void)
@@ -104,7 +104,7 @@ void test_reset_soft__resetting_against_an_unborn_head_repo_makes_the_head_no_lo
 
 	cl_assert_equal_i(true, git_repository_head_unborn(repo));
 
-	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT, NULL, NULL));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT, NULL));
 
 	cl_assert_equal_i(false, git_repository_head_unborn(repo));
 
@@ -124,7 +124,7 @@ void test_reset_soft__fails_when_merging(void)
 
 	cl_git_pass(git_revparse_single(&target, repo, KNOWN_COMMIT_IN_BARE_REPO));
 
-	cl_assert_equal_i(GIT_EUNMERGED, git_reset(repo, target, GIT_RESET_SOFT, NULL, NULL));
+	cl_assert_equal_i(GIT_EUNMERGED, git_reset(repo, target, GIT_RESET_SOFT, NULL));
 	cl_git_pass(p_unlink(git_buf_cstr(&merge_head_path)));
 
 	git_buf_free(&merge_head_path);
@@ -152,7 +152,7 @@ void test_reset_soft__fails_when_index_contains_conflicts_independently_of_MERGE
 	cl_git_pass(git_reference_peel(&target, head, GIT_OBJ_COMMIT));
 	git_reference_free(head);
 
-	cl_assert_equal_i(GIT_EUNMERGED, git_reset(repo, target, GIT_RESET_SOFT, NULL, NULL));
+	cl_assert_equal_i(GIT_EUNMERGED, git_reset(repo, target, GIT_RESET_SOFT, NULL));
 }
 
 void test_reset_soft_reflog_is_correct(void)
@@ -164,19 +164,19 @@ void test_reset_soft_reflog_is_correct(void)
 
 	/* Branch not moving, no reflog entry */
 	cl_git_pass(git_revparse_single(&target, repo, "HEAD^{commit}"));
-	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT, NULL, NULL));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT, NULL));
 	reflog_check(repo, "HEAD", 9, "yoram.harmelin@gmail.com", exp_msg);
 	reflog_check(repo, "refs/heads/master", 9, "yoram.harmelin@gmail.com", exp_msg);
 
 	/* Moved branch, expect default message */
 	cl_git_pass(git_revparse_single(&target, repo, "HEAD~^{commit}"));
-	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT, NULL, NULL));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT, NULL));
 	reflog_check(repo, "HEAD", 9, "yoram.harmelin@gmail.com", exp_msg);
 	reflog_check(repo, "refs/heads/master", 10, NULL, "reset: moving");
 
 	/* Moved branch, expect custom message */
 	cl_git_pass(git_revparse_single(&target, repo, "HEAD~^{commit}"));
-	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT, NULL, "message1"));
+	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT, NULL));
 	reflog_check(repo, "HEAD", 9, "yoram.harmelin@gmail.com", exp_msg);
 	reflog_check(repo, "refs/heads/master", 11, NULL, "message1");
 }
diff --git a/tests/revert/workdir.c b/tests/revert/workdir.c
index 86abde7..171cacb 100644
--- a/tests/revert/workdir.c
+++ b/tests/revert/workdir.c
@@ -48,7 +48,7 @@ void test_revert_workdir__automerge(void)
 
 	git_oid_fromstr(&head_oid, "72333f47d4e83616630ff3b0ffe4c0faebcc3c45");
 	cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	git_oid_fromstr(&revert_oid, "d1d403d22cbe24592d725f442835cf46fe60c8ac");
 	cl_git_pass(git_commit_lookup(&commit, repo, &revert_oid));
@@ -81,7 +81,7 @@ void test_revert_workdir__conflicts(void)
 
 	cl_git_pass(git_repository_head(&head_ref, repo));
 	cl_git_pass(git_reference_peel((git_object **)&head, head_ref, GIT_OBJ_COMMIT));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	cl_git_pass(git_commit_lookup(&commit, repo, &revert_oid));
 	cl_git_pass(git_revert(repo, commit, NULL));
@@ -144,7 +144,7 @@ void test_revert_workdir__orphan(void)
 
 	git_oid_fromstr(&head_oid, "39467716290f6df775a91cdb9a4eb39295018145");
 	cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	git_oid_fromstr(&revert_oid, "ebb03002cee5d66c7732dd06241119fe72ab96a5");
 	cl_git_pass(git_commit_lookup(&commit, repo, &revert_oid));
@@ -179,7 +179,7 @@ void test_revert_workdir__again(void)
 
 	cl_git_pass(git_repository_head(&head_ref, repo));
 	cl_git_pass(git_reference_peel((git_object **)&orig_head, head_ref, GIT_OBJ_COMMIT));
-	cl_git_pass(git_reset(repo, (git_object *)orig_head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)orig_head, GIT_RESET_HARD, NULL));
 
 	cl_git_pass(git_revert(repo, orig_head, NULL));
 
@@ -227,7 +227,7 @@ void test_revert_workdir__again_after_automerge(void)
 
 	git_oid_fromstr(&head_oid, "72333f47d4e83616630ff3b0ffe4c0faebcc3c45");
 	cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	git_oid_fromstr(&revert_oid, "d1d403d22cbe24592d725f442835cf46fe60c8ac");
 	cl_git_pass(git_commit_lookup(&commit, repo, &revert_oid));
@@ -275,7 +275,7 @@ void test_revert_workdir__again_after_edit(void)
 
 	cl_git_pass(git_oid_fromstr(&orig_head_oid, "399fb3aba3d9d13f7d40a9254ce4402067ef3149"));
 	cl_git_pass(git_commit_lookup(&orig_head, repo, &orig_head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)orig_head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)orig_head, GIT_RESET_HARD, NULL));
 
 	cl_git_pass(git_oid_fromstr(&revert_oid, "2d440f2b3147d3dc7ad1085813478d6d869d5a4d"));
 	cl_git_pass(git_commit_lookup(&commit, repo, &revert_oid));
@@ -324,7 +324,7 @@ void test_revert_workdir__again_after_edit_two(void)
 
 	cl_git_pass(git_oid_fromstr(&head_commit_oid, "75ec9929465623f17ff3ad68c0438ea56faba815"));
 	cl_git_pass(git_commit_lookup(&head_commit, repo, &head_commit_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head_commit, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head_commit, GIT_RESET_HARD, NULL));
 
 	cl_git_pass(git_oid_fromstr(&revert_commit_oid, "97e52d5e81f541080cd6b92829fb85bc4d81d90b"));
 	cl_git_pass(git_commit_lookup(&revert_commit, repo, &revert_commit_oid));
@@ -377,7 +377,7 @@ void test_revert_workdir__conflict_use_ours(void)
 
 	git_oid_fromstr(&head_oid, "72333f47d4e83616630ff3b0ffe4c0faebcc3c45");
 	cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	git_oid_fromstr(&revert_oid, "d1d403d22cbe24592d725f442835cf46fe60c8ac");
 	cl_git_pass(git_commit_lookup(&commit, repo, &revert_oid));
@@ -413,7 +413,7 @@ void test_revert_workdir__rename_1_of_2(void)
 
 	git_oid_fromstr(&head_oid, "cef56612d71a6af8d8015691e4865f7fece905b5");
 	cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	git_oid_fromstr(&revert_oid, "55568c8de5322ff9a95d72747a239cdb64a19965");
 	cl_git_pass(git_commit_lookup(&commit, repo, &revert_oid));
@@ -447,7 +447,7 @@ void test_revert_workdir__rename(void)
 
 	git_oid_fromstr(&head_oid, "55568c8de5322ff9a95d72747a239cdb64a19965");
 	cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	git_oid_fromstr(&revert_oid, "0aa8c7e40d342fff78d60b29a4ba8e993ed79c51");
 	cl_git_pass(git_commit_lookup(&commit, repo, &revert_oid));
@@ -476,7 +476,7 @@ void test_revert_workdir__head(void)
 	/* HEAD is 2d440f2b3147d3dc7ad1085813478d6d869d5a4d */
 	cl_git_pass(git_repository_head(&head, repo));
 	cl_git_pass(git_reference_peel((git_object **)&commit, head, GIT_OBJ_COMMIT));
-	cl_git_pass(git_reset(repo, (git_object *)commit, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)commit, GIT_RESET_HARD, NULL));
 	cl_git_pass(git_revert(repo, commit, NULL));
 
 	cl_assert(merge_test_index(repo_index, merge_index_entries, 4));
@@ -513,7 +513,7 @@ void test_revert_workdir__merge_fails_without_mainline_specified(void)
 
 	git_oid_fromstr(&head_oid, "5acdc74af27172ec491d213ee36cea7eb9ef2579");
 	cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	cl_must_fail(git_revert(repo, head, NULL));
 	cl_assert(!git_path_exists(TEST_REPO_PATH "/.git/MERGE_MSG"));
@@ -540,7 +540,7 @@ void test_revert_workdir__merge_first_parent(void)
 
 	git_oid_fromstr(&head_oid, "5acdc74af27172ec491d213ee36cea7eb9ef2579");
 	cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	cl_git_pass(git_revert(repo, head, &opts));
 
@@ -565,7 +565,7 @@ void test_revert_workdir__merge_second_parent(void)
 
 	git_oid_fromstr(&head_oid, "5acdc74af27172ec491d213ee36cea7eb9ef2579");
 	cl_git_pass(git_commit_lookup(&head, repo, &head_oid));
-	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL, NULL));
+	cl_git_pass(git_reset(repo, (git_object *)head, GIT_RESET_HARD, NULL));
 
 	cl_git_pass(git_revert(repo, head, &opts));