$ git clone -n https://src.fedoraproject.org/rpms/kasts.git /var/lib/mock/f42-build-3406853-45143/root/chroot_tmpdir/scmroot/kasts
Cloning into '/var/lib/mock/f42-build-3406853-45143/root/chroot_tmpdir/scmroot/kasts'...
$ git fetch origin 27554e48e18b6b31ccee85c3c748be408ab394ac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kasts
 * [new ref]         27554e48e18b6b31ccee85c3c748be408ab394ac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 27554e4 24.12.3