$ git clone -n https://src.fedoraproject.org/rpms/ghc-git-lfs.git /var/lib/mock/f38-build-side-42-init-devel-641734-26393/root/chroot_tmpdir/scmroot/ghc-git-lfs
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-641734-26393/root/chroot_tmpdir/scmroot/ghc-git-lfs'...
$ git fetch origin eec77695626a3b2861950de2409ad6306b999bd3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-git-lfs
 * [new ref]         eec77695626a3b2861950de2409ad6306b999bd3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eec7769 Convert to %autorelease and %autochangelog