Return 1 from git_cl land when you Ctrl-C it in the middle.

git_cl.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Copyright (C) 2008 Evan Martin <martine@danga.com>
 
 """A git-command for integrating reviews on Rietveld."""
 
 from distutils.version import LooseVersion
@@ skipping 2019 matching lines @@
     # And then swap back to the original branch and clean up.
     RunGit(['checkout', '-q', cl.GetBranch()])
     RunGit(['branch', '-D', MERGE_BRANCH])
     if base_has_submodules:
       RunGit(['branch', '-D', CHERRY_PICK_BRANCH])
 
   if not revision:
     print 'Failed to push. If this persists, please file a bug.'
     return 1
 
+  killed = False
   if pushed_to_pending:
     try:
       revision = WaitForRealCommit(remote, revision, base_branch, branch)
       # We set pushed_to_pending to False, since it made it all the way to the
       # real ref.
       pushed_to_pending = False
     except KeyboardInterrupt:
-      pass
+      killed = True
 
   if cl.GetIssue():
     to_pending = ' to pending queue' if pushed_to_pending else ''
     viewvc_url = settings.GetViewVCUrl()
     if not to_pending:
       if viewvc_url and revision:
         change_desc.append_footer(
             'Committed: %s%s' % (viewvc_url, revision))
       elif revision:
         change_desc.append_footer('Committed: %s' % (revision,))
@@ skipping 16 matching lines @@
     _, branch = cl.FetchUpstreamTuple(cl.GetBranch())
     print 'The commit is in the pending queue (%s).' % pending_ref
     print (
         'It will show up on %s in ~1 min, once it gets Cr-Commit-Position '
         'footer.' % branch)
 
   hook = POSTUPSTREAM_HOOK_PATTERN % cmd
   if os.path.isfile(hook):
     RunCommand([hook, merge_base], error_ok=True)
 
-  return 0
+  return 1 if killed else 0
 
 
 def WaitForRealCommit(remote, pushed_commit, local_base_ref, real_ref):
   print
   print 'Waiting for commit to be landed on %s...' % real_ref
   print '(If you are impatient, you may Ctrl-C once without harm)'
   target_tree = RunGit(['rev-parse', '%s:' % pushed_commit]).strip()
   current_rev = RunGit(['rev-parse', local_base_ref]).strip()
 
   loop = 0
@@ skipping 702 matching lines @@
         ('AppEngine is misbehaving and returned HTTP %d, again. Keep faith '
           'and retry or visit go/isgaeup.\n%s') % (e.code, str(e)))
 
 
 if __name__ == '__main__':
   # These affect sys.stdout so do it outside of main() to simplify mocks in
   # unit testing.
   fix_encoding.fix_encoding()
   colorama.init()
   sys.exit(main(sys.argv[1:]))