title: Git keyword substitution like those in Subversion?
body: <p>I used to work under Subversion/SVN and was instantly using nice feature called keyword substitution. Just putting in source files smth like:</p>
  
  <pre><code>/*
   *   $Author: ivanovpv $
   *   $Rev: 42 $
   *   $LastChangedDate: 2012-05-25 21:47:42 +0200 (Fri, 25 May 2012) $
   */
  </code></pre>
  
  <p>And each time Subversion was substituting keywords (Author, Rev, LastChangedDate) with actual ones.</p>
  
  <p>Some time ago I was forced to move to Git and just wondering is there's something similar to Subversion's keyword substitution in Git?</p>