Got a tip from vbGamer45.
https://linux.oracle.com/switch/centos/Oracle has forked it to make the change easy...so they say...
Switch from CentOS to Oracle Linux
This script is designed to automatically switch a CentOS instance to Oracle Linux by removing any CentOS-specific packages or replacing them with the Oracle Linux equivalent.
Supported versions
This script currently supports switching CentOS Linux 6, CentOS Linux 7 and CentOS Linux 8. It does not support CentOS Stream.