title: Finding the oldest commit in a GitHub repository via the API
body: <p>What is the most efficient way to determine when the initial commit in a GitHub repository was made? Repositories have a <code>created_at</code> property, but for repositories that contain imported history the oldest commit may be significantly older.</p>
  
  <p>When using the command line something like this would work:</p>
  
  <p><code>git rev-list --max-parents=0 HEAD</code></p>
  
  <p>However I don't see an equivalent in the GitHub API.</p>