If managed=False, don't fetch.

gclient_scm.py

Index: gclient_scm.py
diff --git a/gclient_scm.py b/gclient_scm.py
index 26d96585cc667c0b7fd54a62372171e1c732b7e1..1b50abee9c402ed74349cf2e13329f1d42f5aeb2 100644
--- a/gclient_scm.py
+++ b/gclient_scm.py
@@ -356,6 +356,13 @@ class GitWrapper(SCMWrapper):
       verbose = ['--verbose']
       printed_path = True
 
+    if not managed:
+      self.Print('________ unmanaged solution; skipping %s' % self.relpath)
+      try:
+        return self._Capture(['rev-parse', '--verify', 'HEAD'])
+      except subprocess2.CalledProcessError:
+        return None
+
     url = self._CreateOrUpdateCache(url, options)
 
     if revision.startswith('refs/'):
@@ -389,11 +396,6 @@ class GitWrapper(SCMWrapper):
         self.Print('')
       return self._Capture(['rev-parse', '--verify', 'HEAD'])
 
-    if not managed:
-      self._UpdateBranchHeads(options, fetch=False)
-      self.Print('________ unmanaged solution; skipping %s' % self.relpath)
-      return self._Capture(['rev-parse', '--verify', 'HEAD'])
-
     # See if the url has changed (the unittests use git://foo for the url, let
     # that through).
     current_url = self._Capture(['config', 'remote.%s.url' % self.remote])