For openSUSE Leap 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:openQA:GitHub:os-autoinst:openQA:PR-4746/openSUSE_Leap_15.4/devel:openQA:GitHub:os-autoinst:openQA:PR-4746.repo
zypper refresh
zypper install openQA-worker
For openSUSE Leap 15.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:openQA:GitHub:os-autoinst:openQA:PR-4746/openSUSE_Leap_15.3/devel:openQA:GitHub:os-autoinst:openQA:PR-4746.repo
zypper refresh
zypper install openQA-worker