zypper from zypp:SLE-12-SP3-Branch project

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For openSUSE Leap 42.3 Update run the following as root:
zypper addrepo https://download.opensuse.org/repositories/zypp:SLE-12-SP3-Branch/openSUSE_Leap_42.3_Update/zypp:SLE-12-SP3-Branch.repo
zypper refresh
zypper install zypper

Packages for openSUSE Leap 42.3 Update: