diff --git a/Library/Homebrew/cmd/update.rb b/Library/Homebrew/cmd/update.rb
index 94aea383d8..be1176a77f 100644
--- a/Library/Homebrew/cmd/update.rb
+++ b/Library/Homebrew/cmd/update.rb
@@ -43,7 +43,7 @@ class RefreshBrew
           safe_system "git init"
           safe_system "git remote add origin #{REPOSITORY_URL}"
           safe_system "git fetch origin"
-          safe_system "git reset --hard FETCH_HEAD"
+          safe_system "git reset --hard origin/master"
         rescue Exception
           safe_system "/bin/rm -rf .git"
           raise