$ git clone -n https://src.fedoraproject.org/rpms/rust-lddtree.git /var/lib/mock/f38-build-side-42-init-devel-1022580-29648/root/chroot_tmpdir/scmroot/rust-lddtree
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1022580-29648/root/chroot_tmpdir/scmroot/rust-lddtree'...
$ git fetch origin eee276fe3965f70471674bd0a1fea027acaa54f4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-lddtree
 * [new ref]         eee276fe3965f70471674bd0a1fea027acaa54f4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eee276f Added the README