Content sync between Production and Test/Dev

Roughly, I want to keep a job in our CI server to fetch the whole content or deltas from production every night and push it to a SCM and tag it.

So every time we want to refresh test or dev environment, the content is readily available and will not impact the production environment performance.

The problem here is that our content files weight more than 65 gb (lots of media) and tools like git fall short.

Any suggestions? Is there any recommended "Adobe" way to achieve this?

Thanks!

JG