.github: Improve syncbranch debugability (#71596)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/71596
Adds a dry_run to test out push as well as adding in a debug flag to
allow you to see what git commands are running
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>
Test Plan: Imported from OSS
Reviewed By: malfet, bigfootjon
Differential Revision: D33695224
Pulled By: seemethere
fbshipit-source-id: 03bf6a3f2d9594089e134d95c3d35a6779ba7a26
(cherry picked from commit a75a402f9d02d5e4c709e25ca385264f854945d1)
