ls - shows all files in current working directory. It is short for list
cd my-quizzes/ - to change directory. The backward slash is important
Git fetch - this updates remote-tracking branches but it never changes any of your own local branches, and is safe to do without changing your working copy. This can fetch from either a single named repository or URL, or from several repositories at once (a condition follows for the latter part).
Git merge - This will merge choice sources/repos.