title: Performing a git pull in pure PHP
body: <p>I was wondering if anyone knows of a library or how to perform a get pull request with pure PHP, <strong>without</strong> git being installed on the server.</p>
  
  <p>First of all, is this even possible? I have seen the odd class, but they don't seem to be able to perform pull requests.</p>
  
  <p>I guess an alternative would be bundling some form of stripped down version of git with my script. Would that be possible?</p>
  
  <p>I am really at a loss here so any help or suggestions would be much appreciated.</p>
  
  <p>Thanks.</p>