1 files changed, 2 insertions, 2 deletions
diff --git a/lorry b/lorry
index b91522b..b85ad91 100755
--- a/lorry
+++ b/lorry
@@ -241,8 +241,8 @@ class Lorry(cliapp.Application):
         else:
             self.progress('.. updating existing clone')
             self.run_program(['git', 'fetch', spec['url'],
-                              'refs/heads/*:refs/heads/*',
-                              'refs/tags/*:refs/tags/*'], cwd=gitdir)
+                              '+refs/heads/*:refs/heads/*',
+                              '+refs/tags/*:refs/tags/*'], cwd=gitdir)
 
     def gitify_bzr(self, project_name, dirname, gitdir, spec):
         bzrdir = os.path.join(dirname, 'bzr')