exec git init
exec git config user.email i@example.com
exec git config user.name someone
exec git checkout -b main

exec git commit -m 'initial commit' --allow-empty
exec git commit -m 'initial commit' --allow-empty

exec git bisect start

exec git status --porcelain --branch
stdout '## main'

env WANT_STATUS='LocalBranch=main HEAD=[a-f0-9]{7} State=Bisecting IsClean=true'
gitstatus
! stderr .