Patching is usually something that is done with source and configuration files, but for binary executables it usually doesn't really make sense to replace partial binary code. As your RPM is a binary package (not source code), you will have to create a new RPM. If you have done it once, then it won't be as complicated when doing it the next time. Automating the RPM-building process with some shell script makes it even easier.
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T74marcell
Arch Linux