Fixing mistakes with Git

When using Git, at some point you'll commit the wrong file, or use the wrong email address.
Here's a list of resources to help fix up mistakes or code you want to remove.

How to Undo Mistakes with Git [ FreeCodeCamp ]
https://www.freecodecamp.org/news/how-to...-with-git/

How to Uncommit Sensitive Files from Git [ FreeCodeCamp ]
https://www.freecodecamp.org/news/how-to...-from-git/