DNF repositories are configured in INI-files, located at /etc/yum.repos.d/. Simple template for the typical repository configuration file looks like the snippet below:
[repo-name] name=My Repo: LTPS repo desription baseurl=http://myserver.org/downloads/LTPS/repo gpgcheck=0To manipulate Linux TPS software installation/update sources (repositories) edit/create/remove the repo file and run the following command:
dnf makecache --refresh