Download installer and client with:
oc adm release extract --tools registry.ci.openshift.org/origin/release:4.5.0-0.okd-2021-01-19-195138
Loading changelog, this may take a while ...
Unable to show full changelog: could not generate a changelog: error: unable to connect to image repository registry.svc.ci.openshift.org/origin/release@sha256:99b276abe010ba27801d0556d7f9424b3110a259027e99f76d4f0e1dafc51fa1: endpoint "https://registry.svc.ci.openshift.org" does not support v2 API (got 503 Service Unavailable)
Source code for this page located on github