$ git clone -n https://src.fedoraproject.org/rpms/kblackbox.git /var/lib/mock/f42-build-side-1-3517607-46098/root/chroot_tmpdir/scmroot/kblackbox
Cloning into '/var/lib/mock/f42-build-side-1-3517607-46098/root/chroot_tmpdir/scmroot/kblackbox'...
$ git fetch origin 7e0e09f7741a8c902c8ed473dc315767a35d0ef8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kblackbox
 * [new ref]         7e0e09f7741a8c902c8ed473dc315767a35d0ef8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e0e09f 25.04.0