Official backup/restore for content hosts

We are refreshing about 7,000 workstations all connected to satellite for content delivery right now, Satellite 6.1.8

[1] Are there official instructions on what to do prior, during, after an existing content host is replaced with new hardware due to a refresh or parts replacement that wipes the harddrive? Is it only remove and re-register?

[2] If it is remove/reregister, while I understand that the facts about the new system will differ, I'd like an RFE that somehow can re-register if the existing hostname doesn't change and you simply want to reuse the previous UUID and registration of that content host in satellite.

Doing a manual uninstall reinstall of 7,000 content hosts one at a time has proven very cumbersome, and at times has caused hung tasks in foreman and gotten our elasticsearch indicies all mucked up requires various reindexes and slowness in our satellite.