$ git clone -n https://src.fedoraproject.org/rpms/ghc-iproute.git /var/lib/mock/f40-build-2066342-49280/root/chroot_tmpdir/scmroot/ghc-iproute
Cloning into '/var/lib/mock/f40-build-2066342-49280/root/chroot_tmpdir/scmroot/ghc-iproute'...
$ git fetch origin 0df89f12be91c918c53d55ed6b3c23101ba1b3d9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-iproute
 * [new ref]         0df89f12be91c918c53d55ed6b3c23101ba1b3d9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0df89f1 bump release