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