title: GitHub: searching through older versions of files
body: <p>I know that using GitHub I can search through all the current versions of my files in a repo. However, I would also like to search through the older versions of my repo files. For example, say, I used to have a function called get_info() in my code, but deleted it several versions ago, is it possible to search for get_info and find the code. If it is not possible using GitHub, is it possible from the git command line?</p>
  
  <p><strong>EDIT</strong></p>
  
  <p>Thanks to @Mark Longair for showing how this can be done from the git command line. If it's not possible in GitHub it would be a great feature to have.</p>