title: How to test multiple pull-requests at once on github?
body: <p>I reported a bug to an open-source repository on Github. They acknowledged the bug and created multiple pull-requests that supposedly fixed the bug. The problem is I don't know how I can easily test it out. If they only create a single PR, I know I can easily test it out with </p>
  
  <pre><code>git fetch upstream pull/&lt;pullrequest_id&gt;/head:pr
  git checkout pr
  </code></pre>
  
  <p>Checkout to one of the PR and manually apply the rest is very tedious because the changes for each of the PR are huge. What is an easy way for me to test all the PRs at once? The reason they create multiple pull-requests is that they breakdown the bug I filed into multiple sub-bugs, and each of the PRs fixes each sub-bug.</p>