title: Confusing error message from git
body: <p>I got this message from Git:</p>
  
  <blockquote>
    <p>You asked to pull from the remote 'origin', but did not specify
    a branch. Because this is not the default configured remote
    for your current branch, you must specify a branch on the command line.</p>
  </blockquote>
  
  <p>Can anyone explain it? and more important how to fix it?</p>