$ git clone -n https://src.fedoraproject.org/rpms/kblackbox.git /var/lib/mock/f40-build-1582510-24030/root/chroot_tmpdir/scmroot/kblackbox
Cloning into '/var/lib/mock/f40-build-1582510-24030/root/chroot_tmpdir/scmroot/kblackbox'...
$ git fetch origin 3939fd1db3f30b3c619e3a353544226337b123b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kblackbox
 * [new ref]         3939fd1db3f30b3c619e3a353544226337b123b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3939fd1 24.05.2