title: Checkout forked branch of repo without cloning fork
body: <p>I like to do github code reviews, by checking out the code locally in my IDE.</p>
  
  <p>If someone forks a github repo and submits a pull request, is there a way for me to checkout their code without cloning their public forked repo?</p>
  
  <p><code>my-repo</code> - I usually just <code>git checkout branch</code></p>
  
  <p><code>my-repo-forked</code> - Here I need to <code>git clone my-repo-forked</code> and then <code>git checkout branch</code></p>