From 002a3a95dcb7391a8372ba7a74f4e7e9bd48b59b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B8rn=20Forsman?= <bjorn.forsman@gmail.com>
Date: Mon, 16 Mar 2020 14:47:21 +0100
Subject: [PATCH] fetchGit: fix "fatal: couldn't find remote ref
 refs/heads/master" issue with submodules

---
 src/libexpr/primops/fetchGit.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libexpr/primops/fetchGit.cc b/src/libexpr/primops/fetchGit.cc
index e8905b548..66259d778 100644
--- a/src/libexpr/primops/fetchGit.cc
+++ b/src/libexpr/primops/fetchGit.cc
@@ -179,7 +179,7 @@ GitInfo exportGit(ref<Store> store, const std::string & uri,
 
         runProgram("git", true, { "init", tmpDir, "--separate-git-dir", tmpGitDir });
         runProgram("git", true, { "-C", tmpDir, "fetch", "--quiet", "--force",
-                                  "--", cacheDir, fmt("%s:%s", *ref, *ref) });
+                                  "--", cacheDir, fmt("%s", *ref) });
 
         runProgram("git", true, { "-C", tmpDir, "checkout", "--quiet", "FETCH_HEAD" });
         runProgram("git", true, { "-C", tmpDir, "remote", "add", "origin", uri });