$ git clone -n https://src.fedoraproject.org/rpms/rdma-core.git /var/lib/mock/f41-build-861734-170030/root/chroot_tmpdir/scmroot/rdma-core
Cloning into '/var/lib/mock/f41-build-861734-170030/root/chroot_tmpdir/scmroot/rdma-core'...
$ git fetch origin b094ce54aefd5f99eacf27f66c3688d648bb5539:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rdma-core
 * [new ref]         b094ce54aefd5f99eacf27f66c3688d648bb5539 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b094ce5 Switch to use %{valgrind_arches}