$ git clone -n https://src.fedoraproject.org/rpms/idris.git /var/lib/mock/f41-build-side-1-2834429-33684/root/chroot_tmpdir/scmroot/idris
Cloning into '/var/lib/mock/f41-build-side-1-2834429-33684/root/chroot_tmpdir/scmroot/idris'...
$ git fetch origin 1228a2e021813c151b0a3d423e2075bf56f8c5ed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/idris
 * [new ref]         1228a2e021813c151b0a3d423e2075bf56f8c5ed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1228a2e update mtl and bounds with upstream patches