New release of DNF stack (dnf, dnf-plugins-core, dnf-plugins-extras, hawkey and libsolv)
is going to Fedora 21, 22, 23 and rawhide. Most of the fixes happened under the hood in
DNF libraries. The emphasis was on stability and making smooth system upgrades. For more
information take a look at release notes .
Moreover article about usage of `mark` command in real world has been written  for
Check it out.