title: How to get certain commit from GitHub project
body: <p>I need to download the Facebook API from <a href="https://github.com/facebook/facebook-ios-sdk" rel="noreferrer">GitHub</a>. Normally, I just click on the 'Downloads" tab to download the latest source code. In this case, I need an older commit: <a href="https://github.com/facebook/facebook-ios-sdk/commit/91f256424531030a454548693c3a6ca49ca3f35a" rel="noreferrer">91f256424531030a454548693c3a6ca49ca3f35a</a>, but I have no idea how to get the entire project from that commit...</p>
  
  <p>Can someone please tell me how to do this?</p>
  
  <p>(BTW, im on a mac. Don't know if that makes any difference).</p>