Stop tracking and ignore changes to a file or folder in Git
Stop tracking all files recursively in folder conf/
git rm -r --cached conf/.
Changing or setting a remote’s URL
git remote set-url origin git@github.com:username/yourrepository.git
Create a new branch
git branch <branchName>
Switch to a branch
git checkout <branchName>
To revert to previous commit, ignoring any changes:
git reset --hard HEAD
Thanks to: https://git-scm.com/book/en/v2/Git-Branching-Basic-Branching-and-Merging
Thanks to: http://stackoverflow.com/questions/4114095/revert-git-repo-to-a-previous-commit