Merge pull request #11908 from Mic92/pull-request

document shallow clone options in git fetchers

src/nix/flake.md

@@ -245,6 +245,9 @@ Currently the `type` attribute can be one of the following:
   * `./sub/dir` (when used on the command line and `dir/flake.nix` is in a git repository)
   * `git+https://example.org/my/repo`
   * `git+https://example.org/my/repo?dir=flake1`
+  * `git+https://example.org/my/repo?shallow=1` A shallow clone of the repository.
+     For large repositories, the shallow clone option can significantly speed up fresh clones compared
+     to non-shallow clones, while still providing faster updates than other fetch methods such as `tarball:` or `github:`.
   * `git+ssh://[email protected]/NixOS/nix?ref=v1.2.3`
   * `git://github.com/edolstra/dwarffs?ref=unstable&rev=e486d8d40e626a20e06d792db8cc5ac5aba9a5b4`
   * `git+file:///home/my-user/some-repo/some-repo`