$ git clone -n https://src.fedoraproject.org/rpms/kblackbox.git /var/lib/mock/f41-build-847003-163590/root/chroot_tmpdir/scmroot/kblackbox
Cloning into '/var/lib/mock/f41-build-847003-163590/root/chroot_tmpdir/scmroot/kblackbox'...
$ git fetch origin 771da18268189b825df315adad8e9ba50b0f5654:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kblackbox
 * [new ref]         771da18268189b825df315adad8e9ba50b0f5654 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 771da18 24.08.0