Issue Summary

Specifying a plan override of the branch on a linked repository is not persisted. A success message is displayed, but the value is not retained.

Steps to Reproduce

1. Add a linked repository & a plan that uses the linked repository
2. Configure the plan and go to the repository tab
3. Check the Override branch of a linked repository box and specify a branch name
4. Save the page

Expected Results

The branch name is persisted and referenced in builds

Actual Results

The branch name is not persisted, and the original value is used in builds.

Workaround

Currently, there is no known workaround for this behavior. A workaround will be added here when available.