$ git clone -n https://src.fedoraproject.org/rpms/kalarm.git /var/lib/mock/f42-build-3348022-45005/root/chroot_tmpdir/scmroot/kalarm
Cloning into '/var/lib/mock/f42-build-3348022-45005/root/chroot_tmpdir/scmroot/kalarm'...
$ git fetch origin 402c354d7a6ae2129504d67dad8caaf743a70f77:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kalarm
 * [new ref]         402c354d7a6ae2129504d67dad8caaf743a70f77 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 402c354 24.12.3