Feature request: Bringing completion to git aliases

[AntoineCHABANELhe]

Hello!

I have defined many git aliases in my project, for exemple:

[alias]
    # Used to perform checkout on *THE MAIN REPO* and *AUDIO SUBMODULES*
    brcheckout = "!f() { : git checkout ; python -m Resources.Tools.GitAliases.Audios.brcheckout \"$@\"; }; f"

I used the ':' syntax for bash to have git checkout tab completion.
However, this doesn't work with Powershell.

I'm wondering if there is a way to achieve this (completion for bang aliases) with posh-git.

Thanks in advance :)