title: git repository is 13 commits ahead opencv:master
body: <p>I have just done </p>
  
  <pre><code>git pull upstream master -f
  </code></pre>
  
  <p>and my <a href="https://github.com/LaurentBerger/opencv_contrib" rel="nofollow noreferrer">repo</a> is still 13 commits ahead opencv:master.</p>
  
  <p>I have read this <a href="https://stackoverflow.com/questions/2432579/git-your-branch-is-ahead-by-x-commits">post</a> and <a href="https://stackoverflow.com/questions/16288176/your-branch-is-ahead-of-origin-master-by-3-commits">this one</a> but unfortunately it does not help me.
  If i press compare in github interface I can see this 13 commits. How can I have repo even with opencv:master. ?</p>
  
  <p>Thanks for yours answers</p>