I remember you have said that you use this package on your servers in
university, so why don't you just create a new package with any
modifications you need in PKGBUILD and even make it specified for your
needs if you want to and use it for yourself?
What are you trying to accomplish with being called "maintainer" of sge
You can post your PKGBUILD on github/gitlab or any other git service
online to track the modifications, being able to download it from
anywhere, ask for other people's opinion, etc.