These are the necessary files to build an RPM file.

Copy the source code tarball to your SOURCES directory.
Copy SOURCES/rsnapshot.patch to your SOURCES directory.
Copy SPECS/rsnapshot.spec to your SPECS directory.

rpmbuild -bb /path/to/your/SPECS/rsnapshot.spec
rpm -ivh /path/to/your/RPMS/noarch/rsnapshot-1.x.x-0.noarch.rpm

If you don't want to make an RPM, you can download the latest version at
http://www.rsnapshot.org/
