$ git clone -n https://src.fedoraproject.org/rpms/kmymoney.git /var/lib/mock/f39-build-1661718-40665/root/chroot_tmpdir/scmroot/kmymoney
Cloning into '/var/lib/mock/f39-build-1661718-40665/root/chroot_tmpdir/scmroot/kmymoney'...
$ git fetch origin 6a4bacddf05bddfc6d89eeacb5757934fce4996b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kmymoney
 * [new ref]         6a4bacddf05bddfc6d89eeacb5757934fce4996b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a4bacd Rebuild.