For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:perl:CPAN-R/openSUSE_Tumbleweed/devel:languages:perl:CPAN-R.repo
zypper refresh
zypper install perl-Ref-Util
For openSUSE 13.2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:perl:CPAN-R/openSUSE_13.2/devel:languages:perl:CPAN-R.repo
zypper refresh
zypper install perl-Ref-Util
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:perl:CPAN-R/15.6/devel:languages:perl:CPAN-R.repo
zypper refresh
zypper install perl-Ref-Util
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:perl:CPAN-R/15.5/devel:languages:perl:CPAN-R.repo
zypper refresh
zypper install perl-Ref-Util