$ git clone -n https://src.fedoraproject.org/rpms/rust-below-render.git /var/lib/mock/f41-build-700425-12886/root/chroot_tmpdir/scmroot/rust-below-render
Cloning into '/var/lib/mock/f41-build-700425-12886/root/chroot_tmpdir/scmroot/rust-below-render'...
$ git fetch origin 175ffc8b99cb3efe68b4de92b631d2900987ca40:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-below-render
 * [new ref]         175ffc8b99cb3efe68b4de92b631d2900987ca40 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 175ffc8 Update to 0.8.1 (rhbz#2272248)