I'm trying to rebuild Fedora with some changes in the .config file of the kernel configurations. I'm trying to follow the steps in this guide: https://fedoraproject.org/wiki/Building_a_custom_kernel/Source_RPM
However, all throughout the wiki, it's referencing a directory labeled ~/rpmbuild/BUILD, but it never actually shows when to create it, how to set it up, or which files are in it.
Can someone fill in the knowledge gap?