title: Limit POST Hook to git branch, not repository, on Bitbucket
body: <p>Complicated title, let me explain.</p>
  
  <p>I want to limit an automatic POST hook when I push to the <code>master</code> branch; so it won't fire when I push to the <code>dev</code> branch. This is so the app will only deploy to the live servers when the changes have been merged with <code>master</code> and the new <code>master</code> passes the unit tests.</p>
  
  <p>Is this possible?</p>