$ git clone -n https://src.fedoraproject.org/rpms/kalgebra.git /var/lib/mock/f42-build-3406870-45143/root/chroot_tmpdir/scmroot/kalgebra
Cloning into '/var/lib/mock/f42-build-3406870-45143/root/chroot_tmpdir/scmroot/kalgebra'...
$ git fetch origin 41459938d8b85ded6c7af7bbc12e77cbb0b9990c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kalgebra
 * [new ref]         41459938d8b85ded6c7af7bbc12e77cbb0b9990c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4145993 24.12.3