If you don’t want to add your password every time you do a git fetch or git pull
cd ssh-keygen -t rsa cat .ssh/id_rsa.pub cd /<path>/<to>/<repo>/ git remote show origin git remote set-url origin git+ssh://git@github.com/<username>/<repo>.git
※ just press Enter for all of the ssh-keygen options
※ add the content of .ssh/id_rsa.pub to https://github.com/settings/keys as a new SSH key