Navi is good for generating personal cheatsheets:

https://github.com/denisidoro/navi

But for Git, I can't recommend lazygit enough. It's an incredible piece of software:

https://github.com/jesseduffield/lazygit

Cheaters: https://brettterpstra.com/projects/cheaters

I've found tldr to be useful

https://github.com/tldr-pages/tldr