Steps that you need to take in order to submit pull request to an open source project

What to do when you are faced with 'Please, commit your changes or stash them before you can merge.' message from git as you are trying to get latest code off your remote repository

Check in folder into git, but ignore any contents in it (massive logs, models, etc)

How to get back to previous good commit

How to remove files added to git via git add . command