$ git clone -n https://src.fedoraproject.org/rpms/ghc-linear.git /var/lib/mock/f41-build-840826-160968/root/chroot_tmpdir/scmroot/ghc-linear
Cloning into '/var/lib/mock/f41-build-840826-160968/root/chroot_tmpdir/scmroot/ghc-linear'...
$ git fetch origin 9be67ab53f468a38831ecf1c429cc8df47440d3a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-linear
 * [new ref]         9be67ab53f468a38831ecf1c429cc8df47440d3a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9be67ab bump release