repo is a command which can obtain the repository's full name; the {author}/{repository}
-formatted string, from the name of the repository by connecting to the GitHub searching API.
console
$ repo rust
rust-lang/rust
$ repo url rust
https://github.com/rust-lang/rust.git
$ repo git-url rust
git://github.com/rust-lang/rust.git
$ repo link rust
https://github.com/rust-lang/rust
$ git clone $(repo url rust)
Cloning into 'rust'...