rpmrebuild is a tool to build an RPM file from a package that has already been installed. It can be used to easily build modified packages, and works on any Linux distribution that uses RPM.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
A bug has been fixed related to the BuildArch tag, the man pages have
moved to /usr/man and the script to /usr/bin, and the man page version
now matches the program version.