1) Build the package with the provided pom.xml:
$ mvn package
2) Rebuild the RPM structure:
$ mvn -DskipTests=true rpm:rpm
A structure like the following will be created:
/target/rpm/<app_name>/BUILD /target/rpm/<app_name>/RPMS /target/rpm/<app_name>/SOURCES /target/rpm/<app_name>/SPECS /target/rpm/<app_name>/SRPMS