How to push package through automated process from one aem instance to another aem instance

Hi,

We do a content sync from prod env to lower env  regularly to keep the content in sync for testing purpose.

So we would want to automate the process.

1>create a package with delta content for certain time period

2>push the above created  package from prod env to lower env based on hostname or ip

Could some one provide inputs as how we do the above

Thanks