Suggested solution:
Build bot will monitor selected users OpenDNSSEC fork, if a user comment on the last commit of a branch it will check that comment for build commands and execute if any is found. Status for the build will be added as comments to that commit and notifications (hopefully) will be sent to the user by GitHub.
Workflow for user:
- Make a feature branch with changes and push it to GitHub
- Enter GitHub and select the last commit for that feature branch
- At the bottom enter a comment with a build command
- Wait for status
This workflow could easily be made into a shell script for those that need.