generate failed when there is a git proxy

[tiann]

Describe the bug

When i set a git proxy by:

❯ which gitproxy
gitproxy () {
	git config --global http.proxy 'socks5://127.0.0.1:1081'
	git config --global https.proxy 'socks5://127.0.0.1:1081'
}

The cargo-generate will failed like this:

❯ cargo generate https://github.com/aya-rs/aya-template
⚠️   Favorite `https://github.com/aya-rs/aya-template` not found in config, using it as a git repository: https://github.com/aya-rs/aya-template
Error: Please check if the Git user / repository exists.

Caused by:
    unknown http scheme 'socks5'; class=Http (34)

make sure you

• I'm on the latest rust version rustup update
• I'm on the latest cargo-generate version cargo install cargo-generate

To Reproduce
Steps to reproduce the behavior:

1. set a gitproxy by:

git config --global http.proxy 'socks5://127.0.0.1:1081'
git config --global https.proxy 'socks5://127.0.0.1:1081'

I am sure the proxy is working well, because i can git clone successfully.

2. Run cargo generate:

cargo generate https://github.com/aya-rs/aya-template

Expected behavior

It works

Screenshots

Desktop (please complete the following information):

• OS: MacOS
• Version: 12.4
• Build tools: rustc
• Shell: zsh
• rustc --version: rustc 1.61.0 (fe5b13d68 2022-05-18)
• cargo generate --version: cargo-generate 0.15.2

Additional context

When i disable the git proxy, the cargo-generate works well