$ git clone -n https://src.fedoraproject.org/rpms/riemann-c-client.git /var/lib/mock/f40-build-790495-136598/root/chroot_tmpdir/scmroot/riemann-c-client
Cloning into '/var/lib/mock/f40-build-790495-136598/root/chroot_tmpdir/scmroot/riemann-c-client'...
$ git fetch origin 4dfec2e3a216ea86c7b1f28c00475964f930a5a3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/riemann-c-client
 * [new ref]         4dfec2e3a216ea86c7b1f28c00475964f930a5a3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4dfec2e add patches to fix gnutls error handling