$ git clone -n https://src.fedoraproject.org/rpms/mysql8.0.git /var/lib/mock/f40-build-780111-130688/root/chroot_tmpdir/scmroot/mysql8.0
Cloning into '/var/lib/mock/f40-build-780111-130688/root/chroot_tmpdir/scmroot/mysql8.0'...
$ git fetch origin 178aa67c037bf2995a59a466188418c7ca477f02:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mysql8.0
 * [new ref]         178aa67c037bf2995a59a466188418c7ca477f02 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 178aa67 Bump the obsolete release number, due to high number of rebuilds