title: Adding author and date to git describe
body: <p>I have started a changelog using git describe and it works great except for the fact that I would like to show who the author was of the commit and the date that it was committed. Is this possible to do?</p>
  
  <p>Thank you</p>
  
  <p><strong>Update:</strong> Here is the alias I use in my config file to spit out my changelog:</p>
  
  <pre><code>changelog = "!f() { r=${1:-`git describe --tags --abbrev=0`..HEAD}; 
  echo Changelog for $r; gi    t log --reverse --no-merges --format='* %s' $r; }; f"
  </code></pre>