title: Mirror from github to gitlab
body: <p>In Gitlab it is now possible to automatically mirror remote GIT repo:
  <a href="http://docs.gitlab.com/ee/workflow/repository_mirroring.html" rel="noreferrer">http://docs.gitlab.com/ee/workflow/repository_mirroring.html</a></p>
  
  <p>Synchronization is either done manually or via gitlab cron script (running every hour).</p>
  
  <p>I would like to sync in this way my github repo and run Gitlab CI jobs using my own runners.</p>
  
  <p>Is is possible to automatize sync task, i.e. via Github webhooks ? Do you know if there is any other way to do it with Gitlab infrastructure ?</p>
  
  <p>I would like to avoid hacking like:
   - cloning github repo in gitlab runner
   - running my own cron jobs which do sync more often</p>