We fetched the notes. The reason why it works is because of the way we fetched them. By default, Git is configured to fetch refs/heads/* into refs/remotes/origin/*. This way, we can easily keep track of what is remote and what is local. The branches in our local repository are in refs/heads/*. These branches are also listed when you execute git branch.
For notes, we need to fetch refs/notes/* into refs/notes/* since we want to get the notes from the server and use them with the git show, git log, and git notes Git commands.