I chatted with the Koji team and they are planning on having the yum dependency removed in the upcoming 1.17 release and getting that release finished before F30 code freeze.

On Sat, Feb 2, 2019 at 3:35 PM Michal Domonkos <mdomonko@redhat.com> wrote:
On Mon, Jan 28, 2019 at 6:29 PM Ben Cotton <bcotton@redhat.com> wrote:
> https://fedoraproject.org/wiki/Changes/Retire_YUM_3
> == Summary ==
> Remove yum (v3) and all related packages from Fedora.

Just a heads-up that I have updated the proposal so that it does
*not*[2] include python2-urlgrabber, given how much it is still used
within our infra.

This should make it easier to consider the whole change proposal
self-contained and thus more realistic towards Fedora 30.  However,
note that we still need that koji DNF port merged.

[1] https://fedoraproject.org/wiki/Changes/Retire_YUM_3#Detailed_Description
[2] https://fedoraproject.org/wiki/Changes/Retire_YUM_3#Dependencies
Michal Domonkos
Software Engineer, Software Mgmt Subsystem
Red Hat, Inc.
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