LONG_USAGE='git bisect help
print this long help message.
git bisect start [--term-{old,good}=<term> --term-{new,bad}=<term>]
- [--no-checkout] [<bad> [<good>...]] [--] [<pathspec>...]
+ [--no-checkout] [--first-parent] [<bad> [<good>...]] [--] [<pathspec>...]
reset bisect state and start bisection.
git bisect (bad|new) [<rev>]
mark <rev> a known-bad revision/