Fix detatched HEAD, and account for push conflicts

[Fishbowler]

Proposed changes

#3365 fixed CI token generation from #3294
This does more fixing for #3294

• fixes git push to a remote (previously, a detatched HEAD, so can't push anywhere)
• fixes git push when the jobs race each other, or another merge
• fixes workflow dispatch against a branch (in case, for some reason, folks want up-to-date drivers on the branch)

Testing

Successful workflow dispatch: https://github.com/mobile-dev-inc/Maestro/actions/runs/27783663617