$ git clone -n https://src.fedoraproject.org/rpms/mysql8.0.git /var/lib/mock/f41-build-side-1-3131184-39609/root/chroot_tmpdir/scmroot/mysql8.0
Cloning into '/var/lib/mock/f41-build-side-1-3131184-39609/root/chroot_tmpdir/scmroot/mysql8.0'...
$ git fetch origin 5c86644a9227cfc0c5585f6da528b0ff82a07577:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mysql8.0
 * [new ref]         5c86644a9227cfc0c5585f6da528b0ff82a07577 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5c86644 Update to MySQL 8.0.40