git clone - download an existing repo from the internet

git status - show changes made in repository and any pending additions that haven't been committed

git diff - show changes made to file that haven't been committed

git pull - pull changes from remote repository

git push - push changes to remote repository

git log - show log of commits

git mv - move a file while preserving diff

git rm - remove a file

git add - add a file

git checkout - checkout a branch, file, etc

git reset --hard origin/master` - undo all changes, reset to last commit in master

git blame - show who is responsible for what in a specific file

git fetch - download objects from another repo/branch

git merge - merge two branches together

... etc.