GPG verification error occurs when a mock RHEL 10 chroot tries to install glib2. Doesn’t seem to be related to the SRPM used as it’s downloaded fresh from BaseOS and the build hasn’t even started yet. UBI 10 installs it just fine, maybe something’s wrong with mock?
Link to build: https://copr.fedorainfracloud.org/coprs/lunar-rover/testrepo/build/10055305/