'fedpkg local' runs the whole thing with no output. This is unacceptable.
It should first print the rpmbuild command it's running, and should really have a --dry-run option to do nothing but that. Thereafter, it must let the stdout/stderr of the rpmbuild run come through unmolested to fedpkg's output, without delay past small-granularity buffering like "tee" would do. Waiting until the entire rpmbuild is finished to see any output is not an option.