$ git clone -n https://src.fedoraproject.org/rpms/plexus-velocity.git /var/lib/mock/f42-build-3364898-45045/root/chroot_tmpdir/scmroot/plexus-velocity
Cloning into '/var/lib/mock/f42-build-3364898-45045/root/chroot_tmpdir/scmroot/plexus-velocity'...
$ git fetch origin b08dff46fcf7bb295b017220775e7dd370a704e7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plexus-velocity
 * [new ref]         b08dff46fcf7bb295b017220775e7dd370a704e7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b08dff4 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild