Hi @Brian Barnett ,
Just received a confirmation from ADF product team that this is limitation and linking to a repository inside a GitHub organization is not supported currently. I have already shared this feedback with them and an internal work item is opened to review further.
I would recommend you to please do share your feedback/suggestion in ADF user voice forum: https://feedback.azure.com/forums/270578-azure-data-factory All the feedback shared in this forum are actively monitored and reviewed by ADF engineering team. Please do share the feedback link once it is posted so that others with similar idea can up-vote and comment on your suggestion which would increase the priority of feature implementation.
Hope this info helps.
Thank you
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