title: Use git commit history to find project hot-spots?
body: <p>I'm joining a new project with a long and storied commit history, and I'd like to use that history to show me the hot-spots in the project: the files that have been most commonly (and most recently) edited.</p>
  
  <p>Ideally, I'd like to avoid writing more than a few lines of script (ruby, python, javascript; doesn't matter which).</p>
  
  <p>Anybody know of a one-liner that can rank git project files according to their activity in a commit history?</p>