git-repack.sh not server/multiuse safe?

I have been reading the git-repack.sh script and I have found a piece that I am concerned with. It looks like after repacking there is a place when packfiles could be temporarily unaccessible making the objects within temporarily unaccessible. If my evaluation is true, it would seem like git repacking is not "server" safe?

In particular, I am talking about this loop:

 # Ok we have prepared all new packfiles.

 # First see if there are packs of the same name and if so
 # if we can move them out of the way (this can happen if we
 # repacked immediately after packing fully.
 rollback=
 failed=
 for name in $names
 do
        for sfx in pack idx
        do
                file=pack-$name.$sfx
                test -f "$PACKDIR/$file" || continue
                rm -f "$PACKDIR/old-$file" &&
                mv "$PACKDIR/$file" "$PACKDIR/old-$file" ||  
{
                        failed=t
                        break
                }
                rollback="$rollback $file"
        done
        test -z "$failed" || break
 done

It would seem that one way to avoid this (at least on systems supporting hardlinks), would be to instead link the original packfile to old-file first, then move the new packfile in place without ever deleting the original one (from its original name), only delete the old-file link. Does that make sense at all?

Thanks,

-Martin