Git workflow
Clone an existing repo
git clone ##MY REPO##
Create a new branch
git checkout master # we want the branch starting from master
git branch feature
git checkout feature
Push a commit in the new branch
git add --all # or better, the new files one by one
git commit
git push origin feature
Extra github trick
Quickely edit the repository using VSCode online by changing github.com to github.dev in the repository link.