title: Including the current branch name in the commit template
body: <p>I have a commit template set up for git, and I would like to include the name of the current branch in it. I usually set up the branch to be the bug id, and it would help me with filling in boilerplate such as:</p>
  
  <pre><code>Bug : $BUG
  </code></pre>
  
  <p>How can I perform such a substitution with the git comment template?</p>