Consider sso:// repos to be git-managed.

gclient_scm.py

 # 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.
 
 """Gclient-specific SCM-specific operations."""
 
 import collections
 import logging
 import os
 import posixpath
@@ skipping 69 matching lines @@
 
 ### SCM abstraction layer
 
 # Factory Method for SCM wrapper creation
 
 def GetScmName(url):
   if url:
     url, _ = gclient_utils.SplitUrlRevision(url)
     if (url.startswith('git://') or url.startswith('ssh://') or
         url.startswith('git+http://') or url.startswith('git+https://') or
-        url.endswith('.git')):
+        url.endswith('.git') or url.startswith('sso://')):
       return 'git'
     elif (url.startswith('http://') or url.startswith('https://') or
           url.startswith('svn://') or url.startswith('svn+ssh://')):
       return 'svn'
   return None
 
 
 def CreateSCM(url, root_dir=None, relpath=None):
   SCM_MAP = {
     'svn' : SVNWrapper,
@@ skipping 1438 matching lines @@
       new_command.append('--force')
       if command[0] != 'checkout' and scm.SVN.AssertVersion('1.6')[0]:
         new_command.extend(('--accept', 'theirs-conflict'))
     elif options.manually_grab_svn_rev:
       new_command.append('--force')
       if command[0] != 'checkout' and scm.SVN.AssertVersion('1.6')[0]:
         new_command.extend(('--accept', 'postpone'))
     elif command[0] != 'checkout' and scm.SVN.AssertVersion('1.6')[0]:
       new_command.extend(('--accept', 'postpone'))
     return new_command