Use source branch for generated SDK PR state (#45685)

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 9aa4567f-3dd5-4e8f-9a78-373470cadc50

Ray Chen committed 12d ago

6ecb732f5d076e7812ded10c957d422a35ab6a3d

Parent: 480c549

Committed by GitHub <noreply@github.com> on 8/20/2026, 10:21:32 PM