title: How to mark "release" commits in Git?
body: <p>I am editing the <code>master</code> branch in a git repo.</p>
  
  <p>Time-to-time I test a commit and find that it works well. Then I may want to mark the last of such commits as <em>release</em>.</p>
  
  <p>It can be done with branching, but this way I need to switch branches, to merge, to switch back, etc.</p>
  
  <p>Is there an easier way to mark some of <code>master</code> releases as the <em>release</em>?</p>