Would it be possible to get some Fedora-specific information on installation page?
At least something like
$ sudo dnf install rust cargo
Additionally, when system registry gets implemented, it could contain information also how to install distro-packaged version of crates (
sudo dnf install "crate(git2)",
sudo dnf install "(crate(git2) >= 0.6.11 with crate(git2/ssh) and so on).