To publish your work in Git, you need to define a remote repository and ask Git to push your changes there.
To add a new remote:
git-remote add mywebsite ssh://psung.name/~/path/to/repo
This registers a remote under the name mywebsite.
When you do git push mywebsite, Git will take all branches that are present on both ends and push changes from your repo to the remote. If other people have pushed to the repository since you last read from it, you will need to merge their changes locally with git pull mywebsite before pushing.
If you just created a bare repository at the remote and are now looking to do your first push, you can name a single branch to push:
git push mywebsite mybranch
Or you can push all branches:
git push --all mywebsite
To see what state the remote is in before or after you push, it's helpful to use gitk --all (which will show markers for the positions of the local and remote branch heads) or git-show-branch --all (which shows some of that information in a terminal).
When pushing to a location that's accessible by HTTP, you need to tell Git to update some cache information on each push. (HTTP is what Git calls a dumb transport mode.) To do this, you just need to enable one of the hooks which Git has provided for this purpose:
chmod +x hooks/post-update
(That assumes you are running that from the root of a bare repo.)
Then, you are all set for others to clone that repo from an HTTP path.