I just submitted new version to Bodhi.
From the release notes: https://github.com/rpm-software-management/mock/wiki/Release-Notes-1.4.4
* Fedora 27 configs have been added. * /etc/dnf/dnf.conf is used instead of /etc/dnf.conf * /etc/dnf/dnf.conf is populated even when yum is used * Rename group inside of chroot from mockbuild to mock - this will allow you to install mock inside of mock' chroot.
Mirek
buildsys@lists.fedoraproject.org