title: cocoapods: pod update and pod install takes forever
body: <p>I try to update my podfile using the command <code>pod update</code> but it takes forever.
  I did also all the steps according to this question <a href="https://stackoverflow.com/questions/23755974/cocoapods-pod-install-takes-forever">cocoapods - &#39;pod install&#39; takes forever</a> but nothing changed.
  Using the command <code>pod update --verbose</code> i see that it stops here: <code>Updating spec repo master
    $ /usr/bin/git pull --ff-only</code>
  Any suggestion?</p>