It seems that requirements.txt declares a requirement on 'pbr < 1.0', but we have python-pbr 1.8 in rawhide. This makes any package that tries to build against python-lockfile fail with a setuptools error. Suggested fix: remove the version constraints in requirements.txt.
Thanks for the report, I'll implement the proposed solution.
Actually, it looks like pbr isn't a runtime requirement at all, so I'll just remove it: https://bugs.launchpad.net/pylockfile/+bug/1506679