Status code 403 is a Forbidden error.
You will often see this with fedora mirrors accessed via Tor.
I also see it when using apt-cacher-ng via clearnet.
Since it is an error at the server side, there’s little you can do.
Sometimes a little patience is all you need.
Working with Fedora can be frustrating at times, but generally it will
work. Sometimes it’s necessary to clear the cacher before trying another
update.