Outputting graph of RPM repositories for visualization github.com/anvaka/pm.
The download.sh script allows one to fetch arbitrary system repository information via the DNF repograph plugin:
$ ./download.sh fedora
Creates a graph in Dot format of fedora repository. Note that DNF has to know about the given repository id, so if you want to create a CentOS graph from Fedora, you'll have to add CentOS repositories to /etc/yum.repos.d/.