There is DNF builddep Plugin http://akozumpl.github.io/dnf-plugins-core/builddep.html however it is not the same as yum-builddep.
# yum-builddep pulseaudio ... Getting requirements for pulseaudio-4.0-13.gitf81e3.fc20.src --> Already installed : ... ... No uninstalled build requires
# dnf builddep pulseaudio Config time: 0.008 cachedir: /var/cache/dnf/x86_64/20 Loaded plugins: debuginfo-install, generate_completion_cache, copr, playground, download, kickstart, noroot, builddep initialized DebuginfoInstall plugin initialized Copr plugin initialized Playground plugin initialized Noroot plugin initialized BuildDep plugin dnf version: 0.5.2 Command: dnf builddep pulseaudio Installroot: / Base command: builddep Extra commands: [u'pulseaudio'] hawkey sack setup time: 0.023 Error: Failed to open: 'pulseaudio', not a valid spec file. Cleaning up.
yum can work without "actual" local files i.e. yum will find them for us which is super huge! Long live the yum!
poma