title: What does git log --exit-code mean?
body: <p>The <a href="http://git-scm.com/docs/git-log" rel="noreferrer"><code>git-log</code> man page</a> describes the <code>--check</code> option as incompatible with the <code>--exit-code</code> option. I'd like to know what this <code>--exit-code</code> means but I can't find it anywhere. I've tried <code>man git log</code>, <code>man git</code>, Google and direct search here on SO... to no avail!</p>
  
  <p>What does <code>--exit-code</code> mean for <code>git log</code>?</p>