Test repo for renaming.
Apparently GitHub keeps a list of old repository names, and redirects to the newest one.
So test redirects to a newly created repository.
¹) You can rename GitHub repositories via the repo's Settings-tab.
²) However, when you create a repository with an "old" name, that wil override the redirect. You won't get a warning from GitHub about this. When fetching with the old repository URL, you'll get the error:
fatal: refusing to merge unrelated histories. Fix:
git reset --hard and
git remote set-url origin new://url.to/repository (or edit your
.git/config or even re-clone the repository).