kmx.io/rbpkg

diff --git a/lib/rbpkg/repo.rb b/lib/rbpkg/repo.rb
index 067b018..1abfd2d 100644
--- a/lib/rbpkg/repo.rb
+++ b/lib/rbpkg/repo.rb
@@ -4,7 +4,6 @@ load "#{File.dirname(__FILE__)}/sha256.rb"
 class Rbpkg::Repo
 
   @@remote_default = "origin"
-  @@branch_default = "master"
 
   def autogen
     verbose 3, "repo(#{name.inspect}).autogen"
@@ -21,10 +20,6 @@ class Rbpkg::Repo
     ""
   end
 
-  def branch
-    @@branch_default
-  end
-
   def build
     verbose 3, "repo(#{name.inspect}).build"
     if ! tag_present?("build-done")
@@ -48,10 +43,10 @@ class Rbpkg::Repo
 
   def checkout
     verbose(3, "repo(#{name.inspect}).checkout")
-    sh_branch=sh_quote(tree)
+    sh_tree=sh_quote(tree)
     cmd! "cd #{sh_quote(src_dir!)} && git fetch --all"
     cmd! "cd #{sh_quote(src_dir!)} && git reset --hard"
-    cmd! "cd #{sh_quote(src_dir!)} && git checkout #{sh_branch} --"
+    cmd! "cd #{sh_quote(src_dir!)} && git checkout #{sh_tree} --"
     cmd! "cd #{sh_quote(src_dir!)} && git reset --hard"
     cmd! "cd #{sh_quote(src_dir!)} && git submodule update"
   end