title: How to poll GitHub repo to pull on changes
body: <p>I need to add this functionality into my GO program, with goal to poll the repo and perform a git pull on changes. I have been using <a href="https://github.com/src-d/go-git" rel="nofollow noreferrer">https://github.com/src-d/go-git</a> but am unable to find a way to poll.</p>
  
  <p>I don't want to use a webhook to avoid creating a server for incoming payloads.</p>