thodg/libgit2

diff --git a/tests/index/names.c b/tests/index/names.c
index 9007b1b..4e9cda5 100644
--- a/tests/index/names.c
+++ b/tests/index/names.c
@@ -86,7 +86,7 @@ void test_index_names__cleaned_on_reset_hard(void)
 {
 	git_object *target;
 
-	retrieve_target_from_oid(&target, repo, "3a34580a35add43a4cf361e8e9a30060a905c876");
+	cl_git_pass(git_revparse_single(&target, repo, "3a34580"));
 
 	test_index_names__add();
 	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD));
@@ -99,7 +99,7 @@ void test_index_names__cleaned_on_reset_mixed(void)
 {
 	git_object *target;
 
-	retrieve_target_from_oid(&target, repo, "3a34580a35add43a4cf361e8e9a30060a905c876");
+	cl_git_pass(git_revparse_single(&target, repo, "3a34580"));
 
 	test_index_names__add();
 	cl_git_pass(git_reset(repo, target, GIT_RESET_MIXED));
diff --git a/tests/index/reuc.c b/tests/index/reuc.c
index a18d560..0d70306 100644
--- a/tests/index/reuc.c
+++ b/tests/index/reuc.c
@@ -295,7 +295,7 @@ void test_index_reuc__cleaned_on_reset_hard(void)
 {
 	git_object *target;
 
-	retrieve_target_from_oid(&target, repo, "3a34580a35add43a4cf361e8e9a30060a905c876");
+	cl_git_pass(git_revparse_single(&target, repo, "3a34580"));
 
 	test_index_reuc__add();
 	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD));
@@ -308,7 +308,7 @@ void test_index_reuc__cleaned_on_reset_mixed(void)
 {
 	git_object *target;
 
-	retrieve_target_from_oid(&target, repo, "3a34580a35add43a4cf361e8e9a30060a905c876");
+	cl_git_pass(git_revparse_single(&target, repo, "3a34580"));
 
 	test_index_reuc__add();
 	cl_git_pass(git_reset(repo, target, GIT_RESET_MIXED));
@@ -321,7 +321,7 @@ void test_index_reuc__retained_on_reset_soft(void)
 {
 	git_object *target;
 
-	retrieve_target_from_oid(&target, repo, "3a34580a35add43a4cf361e8e9a30060a905c876");
+	cl_git_pass(git_revparse_single(&target, repo, "3a34580"));
 
 	git_reset(repo, target, GIT_RESET_HARD);
 
diff --git a/tests/refs/branches/create.c b/tests/refs/branches/create.c
index abe5f59..94ecc0b 100644
--- a/tests/refs/branches/create.c
+++ b/tests/refs/branches/create.c
@@ -29,15 +29,16 @@ void test_refs_branches_create__cleanup(void)
 
 static void retrieve_target_from_oid(git_commit **out, git_repository *repo, const char *sha)
 {
-	git_oid oid;
+	git_object *obj;
 
-	cl_git_pass(git_oid_fromstr(&oid, sha));
-	cl_git_pass(git_commit_lookup(out, repo, &oid));
+	cl_git_pass(git_revparse_single(&obj, repo, sha));
+	cl_git_pass(git_commit_lookup(out, repo, git_object_id(obj)));
+	git_object_free(obj);
 }
 
 static void retrieve_known_commit(git_commit **commit, git_repository *repo)
 {
-	retrieve_target_from_oid(commit, repo, "e90810b8df3e80c413d903f631643c716887138d");
+	retrieve_target_from_oid(commit, repo, "e90810b8df3");
 }
 
 #define NEW_BRANCH_NAME "new-branch-on-the-block"
diff --git a/tests/reset/hard.c b/tests/reset/hard.c
index 0f80d32..8e9a94c 100644
--- a/tests/reset/hard.c
+++ b/tests/reset/hard.c
@@ -69,8 +69,7 @@ void test_reset_hard__resetting_reverts_modified_files(void)
 		cl_assert_equal_s(before[i], content.ptr);
 	}
 
-	retrieve_target_from_oid(
-		&target, repo, "26a125ee1bfc5df1e1b2e9441bbe63c8a7ae989f");
+	cl_git_pass(git_revparse_single(&target, repo, "26a125e"));
 
 	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD));
 
@@ -95,7 +94,7 @@ void test_reset_hard__cannot_reset_in_a_bare_repository(void)
 	cl_git_pass(git_repository_open(&bare, cl_fixture("testrepo.git")));
 	cl_assert(git_repository_is_bare(bare) == true);
 
-	retrieve_target_from_oid(&target, bare, KNOWN_COMMIT_IN_BARE_REPO);
+	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));
 
@@ -152,7 +151,7 @@ void test_reset_hard__resetting_reverts_unmerged(void)
 		unmerged_index_init(index, entries);
 		cl_git_pass(git_index_write(index));
 
-		retrieve_target_from_oid(&target, repo, "26a125ee1bfc5df1e1b2e9441bbe63c8a7ae989f");
+		cl_git_pass(git_revparse_single(&target, repo, "26a125e"));
 		cl_git_pass(git_reset(repo, target, GIT_RESET_HARD));
 
 		cl_assert(git_path_exists("status/conflicting_file") == 0);
@@ -183,7 +182,7 @@ void test_reset_hard__cleans_up_merge(void)
 	cl_git_pass(git_buf_joinpath(&orig_head_path, git_repository_path(repo), "ORIG_HEAD"));
 	cl_git_mkfile(git_buf_cstr(&orig_head_path), "0017bd4ab1ec30440b17bae1680cff124ab5f1f6");
 
-	retrieve_target_from_oid(&target, repo, "0017bd4ab1ec30440b17bae1680cff124ab5f1f6");
+	cl_git_pass(git_revparse_single(&target, repo, "0017bd4"));
 	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD));
 
 	cl_assert(!git_path_exists(git_buf_cstr(&merge_head_path)));
diff --git a/tests/reset/mixed.c b/tests/reset/mixed.c
index 7b90c23..75aedf0 100644
--- a/tests/reset/mixed.c
+++ b/tests/reset/mixed.c
@@ -27,7 +27,7 @@ void test_reset_mixed__cannot_reset_in_a_bare_repository(void)
 	cl_git_pass(git_repository_open(&bare, cl_fixture("testrepo.git")));
 	cl_assert(git_repository_is_bare(bare) == true);
 
-	retrieve_target_from_oid(&target, bare, KNOWN_COMMIT_IN_BARE_REPO);
+	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));
 
@@ -40,7 +40,7 @@ void test_reset_mixed__resetting_refreshes_the_index_to_the_commit_tree(void)
 
 	cl_git_pass(git_status_file(&status, repo, "macro_bad"));
 	cl_assert(status == GIT_STATUS_CURRENT);
-	retrieve_target_from_oid(&target, repo, "605812ab7fe421fdd325a935d35cb06a9234a7d7");
+	cl_git_pass(git_revparse_single(&target, repo, "605812a"));
 
 	cl_git_pass(git_reset(repo, target, GIT_RESET_MIXED));
 
diff --git a/tests/reset/reset_helpers.c b/tests/reset/reset_helpers.c
index 17edca4..a792c03 100644
--- a/tests/reset/reset_helpers.c
+++ b/tests/reset/reset_helpers.c
@@ -1,10 +1,3 @@
 #include "clar_libgit2.h"
 #include "reset_helpers.h"
 
-void retrieve_target_from_oid(git_object **object_out, git_repository *repo, const char *sha)
-{
-	git_oid oid;
-
-	cl_git_pass(git_oid_fromstr(&oid, sha));
-	cl_git_pass(git_object_lookup(object_out, repo, &oid, GIT_OBJ_ANY));
-}
diff --git a/tests/reset/reset_helpers.h b/tests/reset/reset_helpers.h
index 5dbe9d2..82249ff 100644
--- a/tests/reset/reset_helpers.h
+++ b/tests/reset/reset_helpers.h
@@ -3,4 +3,3 @@
 #define KNOWN_COMMIT_IN_BARE_REPO "e90810b8df3e80c413d903f631643c716887138d"
 #define KNOWN_COMMIT_IN_ATTR_REPO "217878ab49e1314388ea2e32dc6fdb58a1b969e0"
 
-extern void retrieve_target_from_oid(git_object **object_out, git_repository *repo, const char *sha);
diff --git a/tests/reset/soft.c b/tests/reset/soft.c
index bd6fcc2..f5501ac 100644
--- a/tests/reset/soft.c
+++ b/tests/reset/soft.c
@@ -26,8 +26,7 @@ static void assert_reset_soft(bool should_be_detached)
 
 	cl_git_pass(git_reference_name_to_id(&oid, repo, "HEAD"));
 	cl_git_fail(git_oid_streq(&oid, KNOWN_COMMIT_IN_BARE_REPO));
-
-	retrieve_target_from_oid(&target, repo, KNOWN_COMMIT_IN_BARE_REPO);
+	cl_git_pass(git_revparse_single(&target, repo, KNOWN_COMMIT_IN_BARE_REPO));
 
 	cl_assert(git_repository_head_detached(repo) == should_be_detached);
 
@@ -60,7 +59,7 @@ void test_reset_soft__resetting_to_the_commit_pointed_at_by_the_Head_does_not_ch
 	git_oid_fmt(raw_head_oid, &oid);
 	raw_head_oid[GIT_OID_HEXSZ] = '\0';
 
-	retrieve_target_from_oid(&target, repo, raw_head_oid);
+	cl_git_pass(git_revparse_single(&target, repo, raw_head_oid));
 
 	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT));
 
@@ -73,7 +72,7 @@ void test_reset_soft__resetting_to_a_tag_sets_the_Head_to_the_peeled_commit(void
 	git_oid oid;
 
 	/* b25fa35 is a tag, pointing to another tag which points to commit e90810b */
-	retrieve_target_from_oid(&target, repo, "b25fa35b38051e4ae45d4222e795f9df2e43f1d1");
+	cl_git_pass(git_revparse_single(&target, repo, "b25fa35"));
 
 	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT));
 
@@ -85,13 +84,13 @@ void test_reset_soft__resetting_to_a_tag_sets_the_Head_to_the_peeled_commit(void
 void test_reset_soft__cannot_reset_to_a_tag_not_pointing_at_a_commit(void)
 {
 	/* 53fc32d is the tree of commit e90810b */
-	retrieve_target_from_oid(&target, repo, "53fc32d17276939fc79ed05badaef2db09990016");
+	cl_git_pass(git_revparse_single(&target, repo, "53fc32d"));
 
 	cl_git_fail(git_reset(repo, target, GIT_RESET_SOFT));
 	git_object_free(target);
 
 	/* 521d87c is an annotated tag pointing to a blob */
-	retrieve_target_from_oid(&target, repo, "521d87c1ec3aef9824daf6d96cc0ae3710766d91");
+	cl_git_pass(git_revparse_single(&target, repo, "521d87c"));
 	cl_git_fail(git_reset(repo, target, GIT_RESET_SOFT));
 }
 
@@ -99,7 +98,7 @@ void test_reset_soft__resetting_against_an_unborn_head_repo_makes_the_head_no_lo
 {
 	git_reference *head;
 
-	retrieve_target_from_oid(&target, repo, KNOWN_COMMIT_IN_BARE_REPO);
+	cl_git_pass(git_revparse_single(&target, repo, KNOWN_COMMIT_IN_BARE_REPO));
 
 	make_head_unborn(repo, NON_EXISTING_HEAD);
 
@@ -123,7 +122,7 @@ void test_reset_soft__fails_when_merging(void)
 	cl_git_pass(git_buf_joinpath(&merge_head_path, git_repository_path(repo), "MERGE_HEAD"));
 	cl_git_mkfile(git_buf_cstr(&merge_head_path), "beefbeefbeefbeefbeefbeefbeefbeefbeefbeef\n");
 
-	retrieve_target_from_oid(&target, repo, KNOWN_COMMIT_IN_BARE_REPO);
+	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));
 	cl_git_pass(p_unlink(git_buf_cstr(&merge_head_path)));