So, in this case our jobs are deployed from our development workspace to our isolated testing workspace via an automated Azure DevOps pipeline. As such, they are created (and thus run as) a service account user.
Recently we made the switch to using git-based notebooks in our jobs from notebooks stored in the workspace itself. After granting the service account proper access to the repository, configuring it's git integration within the workspace, and turning repositories on for this workspace, we ran into the following error:
Failed to checkout Git repository: RESOURCE_DOES_NOT_EXIST: RESOURCE_DOES_NOT_EXIST: Parent directory /Repos/.internal does not exist.
Some other discussions in this community lead me to believe it is an internal databricks issue.