Recreate WIP branch does not handle submodules properly

[o-orand]

Expected behavior

As template author,
As ops,
I need to have git submodule creation in feature branch to be managed properly during WIP branch recreate

Observed behavior

On WIP branch recreate, .gitmodule is modified but commit referencing submodule level is not applied

Affected release

5.0.3, latest

[o-orand]

workaround n°1: Submodules declared on default git branch are properly handled, so merge submodule declaration into default git branch.
workaround n°2: use wip branch and manually cherry pick commit including submodule bump