$ git clone -n https://src.fedoraproject.org/rpms/kblackbox.git /var/lib/mock/f40-build-2410623-60560/root/chroot_tmpdir/scmroot/kblackbox
Cloning into '/var/lib/mock/f40-build-2410623-60560/root/chroot_tmpdir/scmroot/kblackbox'...
$ git fetch origin 1eb188129a2ec3e17b0c1ccc41d4d00ea54b7cfd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kblackbox
 * [new ref]         1eb188129a2ec3e17b0c1ccc41d4d00ea54b7cfd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1eb1881 24.01.95