I want to push changes automatically into my all local cloned reposoitories whenever I update my code in codecommit main repo.

Git uses a "pull" model for updating local repositories. I'm not aware of any way to push changes from a central repository out to other repositories that use it as an "origin", and doing so could potentially overwrite local changes devs have made.

Can you explain more about the reason you want automatic updates of local repositories? Perhaps understanding your larger goal will reveal some other options for achieving it.