$ git clone -n https://src.fedoraproject.org/rpms/kcron.git /var/lib/mock/f40-build-2376359-60422/root/chroot_tmpdir/scmroot/kcron
Cloning into '/var/lib/mock/f40-build-2376359-60422/root/chroot_tmpdir/scmroot/kcron'...
$ git fetch origin ff6747ad20d6a8b6aa5406a69b88b9de8242ef57:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kcron
 * [new ref]         ff6747ad20d6a8b6aa5406a69b88b9de8242ef57 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff6747a 24.01.95