I just started using git for version control, and made some free repositories on github. I haven't tried anything beyond the very basics of creating a repository and committing and fetching code from multiple sites. I haven't made any branches or done any rebasing. For the basics, the only new concept I had to learn was the index, which I glossed over when first reading the documentation. After playing around a bit, I got a little confused, then kind of figured out what was going on, then read the documentation again, and it became clear.