Ask HN: Git Interactive Tutorial

I've been using git personally for quite a while now for version control, but now I'm on a team of multiple developers, working on a huge piece of software, and dealing with tons of branches... Needless to say, getting used to the workflow and proper way to do things when collaborating on a much larger scale is a bit difficult. Is there anything out there that teaches you how to go about using git properly like an interactive tutorial? I've been shuffling through the git book, but I learn much better by doing and I feel like if there isn't an interactive tutorial posing situations and teaching you the proper way to checkout, pull, rebase, commit, merge, etc then someone should work on creating it! I'm thinking something like Rails for Zombies but for git workflow and conventions.