Fedora requires you to declare all bundled/vendored dependencies in RPMS. To help make this less painful, this tool allows generating that list for you to copy to your rpm.spec file.
cargo install cargo-lock2rpmprovides
From your Rust/Cargo project directory run:
cargo lock2rpmprovides
For debug run with:
cargo lock2rpmprovides -d
To use a different directory:
cargo lock2rpmprovides /folder/that/contains/rust/project