How to use cargo chef with -Zgit=shallow-deps

[Hugo-Trentesaux]

When using git repos as dependencies, it is convenient to shallow clone them to avoid loading useless data. (see https://doc.rust-lang.org/cargo/reference/unstable.html#git). How to use it in combination with cargo chef?

Same for index -Zgit=shallow-index, allows to shallow clone the package index.