Ask HN: Recommendations for becoming a git guru

There are dozens and dozens of git tutorials out there, some are no doubt very good, some are certainly completely dire.

Yes, I can read the manual. Yes, I will be using git obsessively. But equally, it's useful to have some sort of guidance as to where to start, the gotchas that await, and what to try next.

So I turn to HNers.

What git tutorial would you recommend?