1 files changed, 4 insertions, 0 deletions
diff --git a/Library/Homebrew/utils.rb b/Library/Homebrew/utils.rb
index 6684b3696..eae5c922e 100644
--- a/Library/Homebrew/utils.rb
+++ b/Library/Homebrew/utils.rb
@@ -112,6 +112,10 @@ module Homebrew
     Process.wait(pid)
     $?.success?
   end
+
+  def self.git_head
+    HOMEBREW_REPOSITORY.cd { `git rev-parse --verify -q HEAD 2>/dev/null`.chuzzle }
+  end
 end
 
 def with_system_path