Don't replace default fetch config with branch-heads.

gclient_scm.py

Index: gclient_scm.py
===================================================================
--- gclient_scm.py	(revision 189283)
+++ gclient_scm.py	(working copy)
@@ -703,7 +703,8 @@
         # revert').
         if hasattr(options, 'with_branch_heads') and options.with_branch_heads:
           config_cmd = ['config', 'remote.origin.fetch',
-                        '+refs/branch-heads/*:refs/remotes/branch-heads/*']
+                        '+refs/branch-heads/*:refs/remotes/branch-heads/*',
+                        '^\+refs/branch-heads/\*:.*$']

[rohitrao (ping after 24h), 2013/03/20 15:52:41]

Where will the initial "branch-heads" entry come from after this patch goes in? 
This line used to add it, but now it will only change existing "branch-heads"
entries.

[M-A Ruel, 2013/03/20 15:55:24]

'^\\+refs/branch-heads/\\*:.*$'
?

[Michael Moss, 2013/03/20 16:01:11]

I tested this manually and it worked for me as-is.

[Michael Moss, 2013/03/20 16:23:49]

Actually, I tested both ways and it still works. Maybe we're doing some
automatic command scrubbing somewhere? If you like it better with the
double-slashes, I'll keep that.

           self._Run(config_cmd, options)
 
           # Update the "branch-heads" remote-tracking branches, since we might