$ git clone -n https://src.fedoraproject.org/rpms/kblackbox.git /var/lib/mock/f40-build-2349169-60158/root/chroot_tmpdir/scmroot/kblackbox
Cloning into '/var/lib/mock/f40-build-2349169-60158/root/chroot_tmpdir/scmroot/kblackbox'...
$ git fetch origin 6e25ae0a7c14693142886d2a8823de4ad9184056:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kblackbox
 * [new ref]         6e25ae0a7c14693142886d2a8823de4ad9184056 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e25ae0 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild