submodule: try harder to fetch needed sha1 by direct fetching sha1

diff --git a/builtin/fast-export.c b/builtin/fast-export.c
index d9ac5d8410b30e02fbb8edb06a1991655c5be8f4..2471297f7101964c61c055b10e24a7aa4b65326a 100644 (file)
--- a/builtin/fast-export.c
+++ b/builtin/fast-export.c
@@ -880,7 +880,7 @@ static void export_marks(char *file)
        FILE *f;
        int e = 0;
 
-       f = fopen(file, "w");
+       f = fopen_for_writing(file);
        if (!f)
                die_errno("Unable to open marks file %s for writing.", file);