On 29 May 2018 at 15:49, Fedora Rawhide Report <rawhide@fedoraproject.org> wrote:
[..]
Package:      dnf-2.7.5-15.fc29
Old package:  dnf-2.7.5-12.fc29
Summary:      Package manager
RPMs:         dnf dnf-automatic dnf-data dnf-yum python2-dnf python3-dnf
Added RPMs:   dnf-data
Dropped RPMs: dnf-conf
Size:         1.82 MiB
Size change:  342.44 KiB
Changelog:
  * Fri May 25 2018 Martin Hatina <mhatina@redhat.com> - 2.7.5-13
  - Rebase to dnf from dnf-2-modularity-6 release.

  * Fri May 25 2018 Martin Hatina <mhatina@redhat.com> - 2.7.5-14
  - Fix patch applying.

  * Mon May 28 2018 Martin Hatina <mhatina@redhat.com> - 2.7.5.15
  - Do not require libdnf

It is yet another hidden change not listed in above.
python3-dnf subpackage started (again) require deltarp.
Previouselly is spec was "Recommends: deltarpm" and now it is (again) "Requires: deltarpm"
dnf maintainer(s) knows about this https://bugzilla.redhat.com/show_bug.cgi?id=1583834
However for some reason looks like they prefers to apply kind of ostrich tactics. 

Because today has been published next dnf release I'm going to repeating the bugzilla ticket question about deltrpm question but this time publically.

I want to believe that it was nothing more than trivial mistake because Fedora does not offer repo with delta files so fixed instead weak dependency does not make here IMO sense, and such change only pointlessly enlarges the size of the @core.

kloczek
-- 
Tomasz Kłoczko | LinkedIn:http://lnkd.in/FXPWxH