post-build-raw2rpm from devel:UnifiedCore:Tumbleweed project
Select Your Operating System
Add repository and install manually
For standard run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:UnifiedCore:Tumbleweed/standard/devel:UnifiedCore:Tumbleweed.repo zypper refresh zypper install post-build-raw2rpm