man: adjust command for Fedora installations

glibc now has Suggests:glibc-minimal-langpack, so we don't
need to mention it ourselves.

--repo=… is a nicer alternative to --disablerepo=* --enablerepo=….
It also avoids the issue with quoting.

Let's exclude weak deps, but install systemd-networkd, so the container
can configure networking if necessary.

(cherry picked from commit 8c4db562)