$ git clone -n https://src.fedoraproject.org/rpms/cervisia.git /var/lib/mock/f42-build-880636-182989/root/chroot_tmpdir/scmroot/cervisia
Cloning into '/var/lib/mock/f42-build-880636-182989/root/chroot_tmpdir/scmroot/cervisia'...
$ git fetch origin e989de083e9d288204270188670bdf9beb48b776:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cervisia
 * [new ref]         e989de083e9d288204270188670bdf9beb48b776 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e989de0 Rebuild for ppc64le enablement