title: Difference between HEAD and master
body: <p>What is the difference between the <code>HEAD</code> and <code>master</code> in Git?</p>
  <p>I did a clone of a project on GitHub and want to push my changes to the remote. But to which one should I push?</p>
  <p><img src="https://i.stack.imgur.com/2yC3l.png" alt="screenshot" /></p>