usage: tautline update-repin [-h] [--config-env CONFIG_ENV]
                             [--channel {experimental,stable}]

options:
  -h, --help            show this help message and exit
  --config-env CONFIG_ENV
                        Config env file; defaults to the effective one
                        (tautline path, else legacy).
  --channel {experimental,stable}
                        Framework channel whose origin branch to trust
                        (stable|experimental).
