$ git clone -n https://src.fedoraproject.org/rpms/kblackbox.git /var/lib/mock/f40-build-2172220-51046/root/chroot_tmpdir/scmroot/kblackbox
Cloning into '/var/lib/mock/f40-build-2172220-51046/root/chroot_tmpdir/scmroot/kblackbox'...
$ git fetch origin d0efd5be082c19751a742c3dec8a9246b0773ffd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kblackbox
 * [new ref]         d0efd5be082c19751a742c3dec8a9246b0773ffd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d0efd5b 24.01.85