Please, review these links:

http://www.smorgasbork.com/2014/07/16/building-a-custom-centos-7-kickstart-disc-part-1/
http://kfei.logdown.com/posts/143152-build-your-own-customized-install-disc-from-centos-64
https://fedoraproject.org/wiki/QA:Testcase_Kickstart_File_Path_Ks_Cfg
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Installation_Guide/chap-anaconda-boot-options.html#list-boot-options-sources

Packages needed:

Mock:
# yum install epel-release
# yum install mock

Content:
sdk7.cfg => Config file for running mock for a Centos 7
sdk9.cfg => Config file for running mock for a Rocky 9