$ git clone -n https://src.fedoraproject.org/rpms/gnome-rdp.git /var/lib/mock/f40-build-2522345-61800/root/chroot_tmpdir/scmroot/gnome-rdp
Cloning into '/var/lib/mock/f40-build-2522345-61800/root/chroot_tmpdir/scmroot/gnome-rdp'...
$ git fetch origin 96df5f9fbba133a55330e4c50567c90797f1e124:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-rdp
 * [new ref]         96df5f9fbba133a55330e4c50567c90797f1e124 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 96df5f9 Drop i686