title: Issue with Git push
body: <p>As you can see from the picture the last 4 commits from me haven't been pushed because another person made a commit before me and I did not pull. Now it says that I am 4 ahead and 1 behind. When I try to push it says: </p>
  
  <pre><code>    To git@XX.XX.XX.XX:compudoc.git
   ! [rejected]        master -&gt; master (non-fast-forward)
  error: failed to push some refs to 'git@XX.XX.XX.XX:compudoc.git'
  hint: Updates were rejected because a pushed branch tip is behind its remote
  hint: counterpart. If you did not intend to push that branch, you may want to
  hint: specify branches to push or set the 'push.default' configuration variable
  hint: to 'simple', 'current' or 'upstream' to push only the current branch.
  </code></pre>
  
  <p>How can I fix it ?</p>