git: fallback to FOD fetcher

workaround for https://github.com/NixOS/nix/issues/5128

src/fetcher/git.rs

@@ -32,6 +32,7 @@ impl<'a> Fetchgit {
     ) -> Result<String> {
         if args.is_empty() && args_str.is_empty() {
             git_prefetch(matches!(self.0, GitScheme::Yes), url, rev, !submodules)
+                .or_else(|_| self.fetch_fod(values, rev, submodules, args, args_str, nixpkgs))
         } else {
             self.fetch_fod(values, rev, submodules, args, args_str, nixpkgs)
         }

src/fetcher/gitea.rs

@@ -57,6 +57,7 @@ impl FetchFromGitea<'_> {
                     rev,
                     true,
                 )
+                .or_else(|_| self.fetch_fod(values, rev, submodules, args, args_str, nixpkgs))
             } else {
                 url_prefetch(
                     format!("https://{}/{owner}/{repo}/archive/{rev}.tar.gz", self.0),

src/simple.rs

@@ -292,6 +292,7 @@ pub trait SimpleGitFetcher<'a, const N: usize>: SimpleFetcher<'a, N> {
                     rev,
                     !Self::SUBMODULES_DEFAULT,
                 )
+                .or_else(|_| self.fetch_fod(values, rev, submodules, args, args_str, nixpkgs))
             } else {
                 flake_prefetch(self.get_flake_ref(values, rev))
             }