Bonsoir Mary,
Delighted to know you're doing all the hard work on understanding GIT because I know when you've sussed it out, you'll provide a delightfully clear updated doc all the rest of us real dummies will understand too.
And when you've done that, you can explain how to use the command line in three easy steps. 
In principle, I agree with Tim Hunt:
<quote>One of the things I believe about education is that anyone can learn anything if they have the inclination and are able to invest the necessary time and effort. Congratulations for demonstrating that Mary.</quote>
But I also love it when other people do the hard stuff and economise my time and effort.
I don't know how to use GIT .. yet, but thanks to Visvanath's link to "Tech Talk: Linus Torvalds on git" I feel I understand its purpose and why its a great innovation.
Cheers,
Glenys