Para openSUSE Leap 15.6 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/systemsmanagement:Uyuni:Stable:Patches/openSUSE_Leap_15.6/systemsmanagement:Uyuni:Stable:Patches.repo
zypper refresh
zypper install cobbler
Para openSUSE Leap 15.4 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/systemsmanagement:Uyuni:Stable:Patches/openSUSE_Leap_15.4/systemsmanagement:Uyuni:Stable:Patches.repo
zypper refresh
zypper install cobbler