For openSUSE Leap 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:openQA:GitHub:os-autoinst:openQA:PR-5796/openSUSE_Leap_15.6/devel:openQA:GitHub:os-autoinst:openQA:PR-5796.repo
zypper refresh
zypper install openQA-worker
For SLE 15 SP6 Backports run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:openQA:GitHub:os-autoinst:openQA:PR-5796/SLE_15_SP6_Backports/devel:openQA:GitHub:os-autoinst:openQA:PR-5796.repo
zypper refresh
zypper install openQA-worker