title: How can I check whether two branches are "even"?
body: <p>The GitHub web interface has a nice feature telling me whether a branch is even with the <code>master</code> branch.</p>
  
  <p>Is there a command-line equivalent of this feature? I work with multiple repositories and I'm looking for a quick way to see whether branches are even or require attention.</p>
  
  <p>Here are screenshot of the GitHub web interface, for those wondering about this feature:</p>
  
  <p><a href="https://i.stack.imgur.com/FLlHc.png" rel="noreferrer"><img src="https://i.stack.imgur.com/FLlHc.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/FsjcP.png" rel="noreferrer"><img src="https://i.stack.imgur.com/FsjcP.png" alt="enter image description here"></a></p>