title: git rename many files and folders
body: <p>I am trying to rename many files in my application and need to be able to do a rename in all subdirectories from the app root through git (i.e. git mv %filenamematch% %replacement%) that only replaces the matching text. I'm no good with bash scripting though.</p>
  
  <p>update: would be good it if also renamed directories that match as well!</p>