[ceph-users] Get past epoch pg map

Is there a way to get a pg dump for a previous epoch? I have a situation where I want to make sure all of the PGs that used to be on a specific OSD are deep scrubbed. However, since that OSD is now down and all the PGs have been relocated, I don't know what the PG numbers are. I know the epoch number I want to look at, and I can "ceph osd getmap <epoch>". But I'm not sure if there's a way to use this to get/view the pg map.