This is bug fix release, we fixed following issues:

• 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. Please invalidate your previous caches.