$ git clone -n https://src.fedoraproject.org/rpms/ghc-git-lfs.git /var/lib/mock/f39-build-1976584-43332/root/chroot_tmpdir/scmroot/ghc-git-lfs
Cloning into '/var/lib/mock/f39-build-1976584-43332/root/chroot_tmpdir/scmroot/ghc-git-lfs'...
$ git fetch origin a73884278568b792c443938addb8349740195a75:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-git-lfs
 * [new ref]         a73884278568b792c443938addb8349740195a75 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a738842 https://hackage.haskell.org/package/git-lfs-1.2.1/changelog