GOFLAGS is used indirectly by go via the env var?
it is not used in the cmdline

-buildmode=pie

would also be good to have

the sysconfig files should have the sysconfig header so the yast sysconfig module can show the help and everything.

the %systemd_* macros can handle more than one service

revision and branch you can grab from git and define them as variables in the spec file so you do not have to put "NA" there

superseded by 848945