From e89d02bf031277bd81a8ce255f49d352763e5c71 Mon Sep 17 00:00:00 2001
From: Will Dietz <w@wdtz.org>
Date: Wed, 28 Feb 2018 15:03:54 -0600
Subject: [PATCH] fetchGit: use "HEAD" as default ref

---
 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 2e3e2634d..9fc0d4662 100644
--- a/src/libexpr/primops/fetchGit.cc
+++ b/src/libexpr/primops/fetchGit.cc
@@ -79,7 +79,7 @@ GitInfo exportGit(ref<Store> store, const std::string & uri,
         ref = "HEAD"s;
     }
 
-    if (!ref) ref = "master"s;
+    if (!ref) ref = "HEAD"s;
 
     if (rev != "" && !std::regex_match(rev, revRegex))
         throw Error("invalid Git revision '%s'", rev);