}
orig_head=$(git rev-parse -q --verify HEAD)
git fetch $verbosity $progress $dry_run $recurse_submodules $all $append \
-$upload_pack $force $tags $prune $keep $depth $unshallow $update_shallow \
+${upload_pack+"$upload_pack"} $force $tags $prune $keep $depth $unshallow $update_shallow \
$refmap --update-head-ok "$@" || exit 1
test -z "$dry_run" || exit 0