title: how to use git pull with GitPython?
body: <p>I am trying to pull filesfrom git using python but it's not working. Below is the code I was using:</p>
  <pre><code>import git 
  git.cmd.Git().pull('https://github.com/User/repo','master') 
  </code></pre>
  <p>it asks for authentication and after that terminates.</p>
  <p>Could someone please help me here? what's wrong with this code?</p>