[PATCHv2 5/6] submodule update: add super-reference flag

When we have a another clone of a superproject, we may want to mirror the submodules using alternates. Introduce an option `--super-reference` that let's a user point to another superproject, which is assumed to have the same structure as the one they are running the "submodule update" command

[PATCHv2 5/6] submodule update: add super-reference flag

When we have a another clone of a superproject, we may want to mirror the submodules using alternates. Introduce an option `--super-reference` that let's a user point to another superproject, which is assumed to have the same structure as the one they are running the "submodule update" command

Re: [PATCHv2 5/6] submodule update: add super-reference flag

Stefan Beller writes: > When we have a another clone of a superproject, we may want to > mirror the submodules using alternates. Introduce an option > `--super-reference` that let's a user point to another superproject, > which is assumed to have the same structure as the one