How to make mount --bind permanent?

When I am doing:

mount --bind dirone dirtwo

After OS reboot the binding is lost.

I am checking binded dirs in /proc/mounts

How can I make these binds permanent without clogging up /etc/fstab ?

Here's one entry from /proc/mounts

/dev/disk/by-uuid/4f5082d7-aba2-4bc7-8d64-3bbb3d773aab /home/username/dir ext4 rw,relatime,data=ordered 0 0