For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:fbui:systemd:v259/openSUSE_Tumbleweed/home:fbui:systemd:v259.repo
zypper refresh
zypper install systemd-mini-container
For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:fbui:systemd:v259/openSUSE_Factory/home:fbui:systemd:v259.repo
zypper refresh
zypper install systemd-mini-container
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:fbui:systemd:v259/16.0/home:fbui:systemd:v259.repo
zypper refresh
zypper install systemd-mini-container