For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mook_work:golang/openSUSE_Tumbleweed/home:mook_work:golang.repo
zypper refresh
zypper install zypper-filesearch
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mook_work:golang/16.0/home:mook_work:golang.repo
zypper refresh
zypper install zypper-filesearch
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mook_work:golang/15.6/home:mook_work:golang.repo
zypper refresh
zypper install zypper-filesearch