https://www.ahdictionary.com/word/search.html?q=git
Dolt - A stupid person; a dunce.
We had a place where we would put up a dialog that would say “Do It”, or “Cancel”, and we’d give somebody a document and say “Here, edit this and save it”, and they’d get to the point where they’re supposed to choose “Do It”, and they’d look a little miffed, and then hit cancel. And we saw that several times, different people.
[...] And when we saw this [in the video recordings], people looking a little miffed and then hitting cancel instead of do it, we turned up the volume and played it back, and [heard them mutter]: “What’s this ‘Dolt’?” I’m no dolt! So I hit cancel”.
https://scs.hosted.panopto.com/Panopto/Pages/Viewer.aspx?id=...
There's a lot of different ways that you could interpret the name Linus chose. That's part of what made it clever.
It's such a short word I'd probably have missed it or misheard it as 'cad' or something.
For instance: stop being such a git - this is not imploring someone not to be stupid, it's saying don't be annoying, awkward etc.
Even if it's a joke on yourself, just like, why would you give anyone who hasn't heard of your project the idea that it might be mean?
You wouldn't name your pet Dumbass. Why your pet project.