$ git clone -n https://src.fedoraproject.org/rpms/ivykis.git /var/lib/mock/f40-build-796697-140843/root/chroot_tmpdir/scmroot/ivykis
Cloning into '/var/lib/mock/f40-build-796697-140843/root/chroot_tmpdir/scmroot/ivykis'...
$ git fetch origin 2bcf3d7504d7f2061e2a5ed5d94a2f961a3f66c9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ivykis
 * [new ref]         2bcf3d7504d7f2061e2a5ed5d94a2f961a3f66c9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2bcf3d7 update to 0.43