don't use deprecated stub function from koji

[rcerven]

• CLOUDBLD-12400

Signed-off-by: Robert Cerven rcerven@redhat.com

Maintainers will complete the following section

• [x] Commit messages are descriptive enough
• [x] Code coverage from testing does not decrease and new code is covered
• n/a JSON/YAML configuration changes are updated in the relevant schema
• n/a Pull request has a link to an osbs-docs PR for user documentation updates

[rcerven]

rn updated