My favorite Git command is:
git lola
This is an alias of the git log command
git config --global alias.lola "log --graph --decorate --pretty=oneline --abbrev-commit --all --date=local"
I like it a lot because it shows the log of all the commits in the repository, and it also has some color to highlight the different branches.

I learned about this command when I started working full time as a software engineer and I think that it has saved me a lot of time and headache. I hope it is useful to you too!