$ git clone -n https://src.fedoraproject.org/rpms/ghc-git-lfs.git /var/lib/mock/f41-build-side-1-2805282-32863/root/chroot_tmpdir/scmroot/ghc-git-lfs
Cloning into '/var/lib/mock/f41-build-side-1-2805282-32863/root/chroot_tmpdir/scmroot/ghc-git-lfs'...
$ git fetch origin c84614fd78cb9ec52ea9f9008d7528fcd8eb876a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-git-lfs
 * [new ref]         c84614fd78cb9ec52ea9f9008d7528fcd8eb876a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c84614f https://hackage.haskell.org/package/git-lfs-1.2.2/changelog