git-fetch: use fetch--tool pick-rref to avoid local fetch from alternate

diff --git a/path.c b/path.c
index c5d25a4b903bd92930df4004d30d4dffa6054456..6395cf23098841c16d993ae7e86b2d8dcff01cd7 100644 (file)
--- a/path.c
+++ b/path.c
@@ -252,7 +252,7 @@ char *enter_repo(char *path, int strict)
 
        if (access("objects", X_OK) == 0 && access("refs", X_OK) == 0 &&
            validate_headref("HEAD") == 0) {
-               putenv("GIT_DIR=.");
+               setenv("GIT_DIR", ".", 1);
                check_repository_format();
                return path;
        }