How to hide my one-off fork repo in Github?
I've forked the public repo, make the changes and pull request back to the parent repo. The parent repo owner merged my request.
My forked repo is one-off, I don’t want to see it in my list.
Can I hide it?
You have two possibilities:
You can "hide" the repository from your GitHub profile by deleting the repository from GitHub, but leaving the local repository on your computer (or somewhere else).
You can then later re-add that local repo to GitHub if needed.
You can make the repository private (by first duplicating it) so that others won't see it on your profile, but it's still there, only you can see it.