unlikely. they probably have a very dirty repo with tons of binaries, images, blah blah blah. It's highly unlikely they actually wrote 8GB of code, and the 46GB .git directory will be littered with binary blob changes, etc. This is really just to "impress" two people: 1) People who love Facebook 2) People who don't know anything about version control and/or how to do proper version control (no binaries in the scm).