Update cheatsheets

cargo-fetch

@@ -0,0 +1,17 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# cargo fetch
+
+> Fetch dependencies of a package from the network.
+> More information: <https://doc.rust-lang.org/cargo/commands/cargo-fetch.html>.
+
+- Fetch dependencies specified in `Cargo.lock` (for all targets):
+
+`cargo fetch`
+
+- Fetch dependencies for the specified target:
+
+`cargo fetch --target {{target_triple}}`