[3 people stand in front of a laptop on a desk. Person 3 just stands there and learns]
Person 1: This is git. It tracks collaborative work on projects through a beautiful distributed graph theory tree model.
Person 2: Cool. How do we use it?
Person 1: No idea. Just memorize these shell commands and type them to sync up.
If you get errors, save your work elsewhere, delete the project, and download a fresh copy.
If that doesn't fix it, git.txt contains the phone number of a friend of mine who understands git. Just wait through a few minutes of 'It's really pretty simple, just think of branches as...' and eventually you'll learn the commands that will fix everything.