unable to un-buffer mock output on RHEL 8

[Ken Dreyer]

When I run mock in Jenkins on RHEL 8, I cannot get it to buffer its
output to Jenkins' console.

Normally when I run Python programs (eg. Pungi) I can force the output
to go immediately to Jenkins by setting the PYTHONUNBUFFERED=1
environment variable.

Unfortunately this is not sufficient when I use mock 1.4.13 on el8.

Is there anything else I could try?

- Ken