[BUG] The utility does not inform when no build found

[danmyway]

Describe the bug

When non-existent reference provided, the utility exits after
INFO | Getting copr build info for referenced main.
with no clear indication of what is happening.

To Reproduce

Try dispatching copr build tests with -ref master for convert2rhel or -ref main for leapp-repository or any other non-existent Pull Request number, e.g. -ref pr123456
tesar test copr c2r -ref master … or tesar test corp leapp-repository -ref main ...

Expected behavior

The user is informed when the build with the provided reference is not available.

CLI Output

❯ tesar test copr leapp-repository -t 79to86 -ref main -p tier0/non-destructive --dry-run -g gitlab.cee.redhat oamg leapp-tests
INFO | Getting copr build info for referenced main.

[github-actions]

Hi, there.

Thank you @danmyway for submitting the bug report. Someone will take a look at this shortly.

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[danmyway]

This still wasn't fixed for brew builds.