cobbler from systemsmanagement:Uyuni:Stable:openSUSE_Leap_42-Uyuni-Client-Tools project
Select Your Operating System
Add repository and install manually
For openSUSE Leap 42.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/systemsmanagement:Uyuni:Stable:openSUSE_Leap_42-Uyuni-Client-Tools/openSUSE_Leap_42.3/systemsmanagement:Uyuni:Stable:openSUSE_Leap_42-Uyuni-Client-Tools.repo zypper refresh zypper install cobbler