This is not reproducible in the Red Hat Enterprise Linux 8 buildroot. The CentOS Stream 8 buildroot appears to be fine as well (glibc-common-2.28-196.el8.x86_64 is available there). This looks like an issue with this specific COPR setup.
(In reply to Florian Weimer from comment #3)
> This is not reproducible in the Red Hat Enterprise Linux 8 buildroot. The
> CentOS Stream 8 buildroot appears to be fine as well
> (glibc-common-2.28-196.el8.x86_64 is available there). This looks like an
> issue with this specific COPR setup.
Discussing further on bug #2073385 .