Save the GIT hash of HEAD when uploading to rietveld.

git_cl.py

Index: git_cl.py
===================================================================
--- git_cl.py	(revision 188803)
+++ git_cl.py	(working copy)
@@ -95,11 +95,16 @@
 
 def git_set_branch_value(key, value):
   branch = Changelist().GetBranch()
-  if branch:
-    git_key = 'branch.%s.%s' % (branch, key)
-    RunGit(['config', '--int', git_key, "%d" % value])
+  if not branch:
+    return
 
+  cmd = ['config']
+  if isinstance(value, int):
+    cmd.append('--int')
+  git_key = 'branch.%s.%s' % (branch, key)
+  RunGit(cmd + [git_key, str(value)])
 
+
 def git_get_branch_default(key, default):
   branch = Changelist().GetBranch()
   if branch:
@@ -1288,9 +1293,13 @@
   print_stats(options.similarity, options.find_copies, args)
   if settings.GetIsGerrit():
     return GerritUpload(options, args, cl)
-  return RietveldUpload(options, args, cl)
+  ret = RietveldUpload(options, args, cl)
+  if not ret:
+    git_set_branch_value('last-upload-hash', RunGit(['rev-parse', 'HEAD']))
 
+  return ret
 
+
 def IsSubmoduleMergeCommit(ref):
   # When submodules are added to the repo, we expect there to be a single
   # non-git-svn merge commit at remote HEAD with a signature comment.