As far as I’m aware, rclone does not support anything like the --link-dest option of rsync. And rsync can only do this, I believe, on file systems hat support the creation of hard links.
Most remote or ‘cloud’ systems don’t expose low level things like this, so it might not make sense for rclone to implement it, just for systems that do expose it. For system that do expose it, you have rsync!
So use rclone for cloud -> local, then rsync --link-dest that local repo, or a copy of it to a --link-dest hierarchy.
I think you might be able to use --link-dest with rsync.net, and perhaps some other services (elastichosts perhaps) and virtual servers, but for the most part, I guess you can only use --link-dest on your local side.
It might be an idea to look at ZFS and btrfs for other snapshot options.
===Rich