For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:cahu:branches:security:SELinux:1257527/openSUSE_Factory/home:cahu:branches:security:SELinux:1257527.repo
zypper refresh
zypper install selinux-policy
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:cahu:branches:security:SELinux:1257527/16.0/home:cahu:branches:security:SELinux:1257527.repo
zypper refresh
zypper install selinux-policy
For 15.7 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:cahu:branches:security:SELinux:1257527/15.7/home:cahu:branches:security:SELinux:1257527.repo
zypper refresh
zypper install selinux-policy