This is really cool, and has inspired the latest function to be added to my zshrc:

  vscodetmp () {
    local repo=$1
    [[ ! $repo =~ "https://*" ]] && repo="https://github.com/${repo}"
    local temp="$(mktemp -d)"
    git clone "${repo}" "${temp}"
    code --wait -n "${temp}"
    rm -rf "${temp}"
  }