title: Git commit option to split branches in the network graph
body: <p>On my git network graph, I want to keep branches separated.  However if I have a circumstance where I split my master to branch A, then make one or more commits to A, then merge it back to master, the graph shows a single line for both master and A, despite the fact that at least one commit point was not included.</p>
  
  <p>In other words, my graph looks like this:</p>
  
  <pre><code>*------*------*------* (master/A)
  </code></pre>
  
  <p>And I want it to look like this:</p>
  
  <pre><code>*------*------*------* (master/A)
   \__________________/
  </code></pre>
  
  <p>I know there's an option either in commit or push to force this (and I did it once, ages ago), but for the life of me I can't find it.  </p>
  
  <p>Does anyone know the command to do this?  And second, for extra credit, its location in Android Studio?</p>
  
  <p>Thanks!</p>