title: Git asks for commit message when pulling from other branch
body: <p>Our company git workflow looks like this: Every team member has there own branch and pulls from and pushes to a main branch called develop.</p>
  
  <p>Whenever I go <code>git pull develop</code> git automatically opens up a texteditor (my beloved vim that is) and asks <code>Explain why this merge is necessary</code>. </p>
  
  <p>Why is this and how can I get rid of it?</p>