Call status before reset in gclient sync.

gclient_scm.py

Index: gclient_scm.py
diff --git a/gclient_scm.py b/gclient_scm.py
index 4a4e6015461582fbf28a1034f63e66aba1e26770..49e53f6bfbd3945ebdf2308fbc2db8ec80d9a376 100644
--- a/gclient_scm.py
+++ b/gclient_scm.py
@@ -534,6 +534,13 @@ class GitWrapper(SCMWrapper):
       target = 'HEAD'
       if options.upstream and upstream_branch:
         target = upstream_branch
+
+      # Builds can create hard links which update source files' ctimes, causing
+      # git to become confused over what files are out-of-date. Calling
+      # `git status` resynchronizes git and allows `git reset --hard` to not
+      # re-checkout files (and thus forcing unnecessary rebuilds)".
+      self._Run(['status'], options)
+
       self._Run(['reset', '--hard', target], options)
 
     if current_type == 'detached':