Description of problem:
Both go-compilers-golang-compiler-1-20.el8 from CRB repo and go-srpm-macros-2-17.el8 from AppStream provide different versions of %gobuild macro.

In a system with both installed, %gobuild macro from go-compilers-golang-compiler takes precedence over the definition from go-srpm-macros.

Version-Release number of selected component (if applicable):
go-srpm-macros-2-17.el8
go-compilers-golang-compiler-1-20.el8

Steps to Reproduce:

When only go-srpm-macros installed, %gobuild is defined as:

[root@ci-vm-10-0-138-246 ~]# rpm -qa go-srpm-macros go-compilers-golang-compiler
go-srpm-macros-2-17.el8.noarch
[root@ci-vm-10-0-138-246 ~]# rpm -E '%gobuild'

CGO_CPPFLAGS="-D_FORTIFY_SOURCE=2 -fstack-protector-all" go build -compiler gc -buildmode pie '-tags=rpm_crashtraceback libtrust_openssl ' -ldflags "-linkmode=external -compressdwarf=false ${LDFLAGS:-} -B 0x$(head -c20 /dev/urandom|od -An -tx1|tr -d ' \n') -extldflags '%__global_ldflags'" -a -v -x ;
[root@ci-vm-10-0-138-246 ~]# 

Compared to another system with both go-compilers-golang-compiler and go-srpm-macros installed:

[root@ci-vm-10-0-139-131 ~]# rpm -qa go-srpm-macros go-compilers-golang-compiler
go-srpm-macros-2-17.el8.noarch
go-compilers-golang-compiler-1-20.el8.x86_64
[root@ci-vm-10-0-139-131 ~]# rpm -E '%gobuild'

%ifnarch ppc64 
go build -buildmode pie -compiler gc -tags=rpm_crashtraceback -ldflags "-compressdwarf=false ${LDFLAGS:-} -B 0x$(head -c20 /dev/urandom|od -An -tx1|tr -d ' \n') -extldflags '%__global_ldflags'" -a -v -x ;
%else 
go build -compiler gc -tags=rpm_crashtraceback -ldflags "-compressdwarf=false ${LDFLAGS:-} -B 0x$(head -c20 /dev/urandom|od -An -tx1|tr -d ' \n') -extldflags '%__global_ldflags'" -a -v -x ;
%endif
[root@ci-vm-10-0-139-131 ~]#