I've never felt that the commands don't make sense or that they don't map to my mental model. Actually I don't understand that complaint. It's not like I set a mental model prior to learning git and expect git to follow it. I base my mental model on git while learning it, so of course it's going to map it. That's what learning how to use a software entails.

If we're talking about inconsistencies in git, the only one that comes to mind is how diff's `...` behaves like log's `..` and diff's `..` behaves like log's `...`. I.e. if you want to see the changes of `git log a..b` as a single diff, you'd use `git diff a...b`. If you want to see the changes of `git log a...b` as a single diff, you'd use `git diff a..b`.