1 files changed, 3 insertions, 2 deletions
diff --git a/lorry b/lorry
index 43a58f7..6bca47a 100755
--- a/lorry
+++ b/lorry
@@ -319,8 +319,9 @@ class Lorry(cliapp.Application):
             self.progress('.. initialising git dir')
             self.run_program(['git', 'init', '--bare', gitdir])
         self.progress('.. updating existing clone')
-        argv = ['git', 'fetch', '--prune', spec['url'],
-                '+refs/heads/*:refs/heads/*', '+refs/tags/*:refs/tags/*']
+        argv = ['git', '-c', 'gc.autodetach=false', 'fetch', '--prune',
+                spec['url'], '+refs/heads/*:refs/heads/*',
+                '+refs/tags/*:refs/tags/*']
         self.run_program(argv, cwd=gitdir, env=env)
 
     def gitify_bzr(self, project_name, dirname, gitdir, spec):