Have you tried git push? gitref.org has a nice section dealing with remote repositories.
You can also get help from the command line using the --help
option. For example:
% git push --help
GIT-PUSH(1) Git Manual GIT-PUSH(1)
NAME
git-push - Update remote refs along with associated objects
SYNOPSIS
git push [--all | --mirror | --tags] [-n | --dry-run] [--receive-pack=<git-receive-pack>]
[--repo=<repository>] [-f | --force] [-v | --verbose] [-u | --set-upstream]
[<repository> [<refspec>...]]
...