How does the k8s operator restart deployments?

I don't see in the documentation anywhere but I'd like to know how the operator restarts deployments.

My main concern is that if a secret is updated, a deployment will hard-restart and possibly interrupt an operation mid-request.

Is there a way to configure how it restarts deployments, with a custom shutdown command that can be handled by the service properly, finish it's current request and then restart nicley?