title: GitLab mirroring feature doesn't work when pulling from a remote repo
body: <p>I cloned my repo into <code>GitLab</code> (SaaS - Bronze plan) from <code>bitbucket</code> over <code>HTTPS</code>, which was successful.
  Then I tried to setup a mirror (pull) to pull into Gitlab, all changes made to bitbucket. I entered the right details ,ie, the URL of the repo and the password but the mirroring fails and throws the following error -</p>
  
  <p><a href="https://i.stack.imgur.com/z8Rui.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/z8Rui.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/u5pAw.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/u5pAw.png" alt="enter image description here"></a></p>
  
  <p>HELP!!!</p>