On 1 January 2018 at 16:18, Steven Watanabe via Boost-Testing
<boost-testing@lists.boost.org> wrote:
>
> regression.py tries to fix up the tree, but it seems
> that it doesn't handle the case of removing a submodule.
>
> https://github.com/boostorg/regression/blob/develop/testing/src/regression.py#L852
>
> I don't know git well enough to know what the correct command
> would be.

According to the man page you need to use '-f' twice with 'git clean'.