filter virt-who output to include only RHEL guests in an ESX environment

Hello!
We have 800+ and growing VMs in a VMWare ESX environment across multiple hosts and mix RHEL, Windows, appliance, and other non-RHEL vms. We want virt-who to only collect and report RHEL vms and send only RHEL vms to the Satellite services. How can we go about this?

Thanks!