Write packed-refs with 0644 permissions

Signed-off-by: Carlos Martín Nieto <carlos@cmartin.tk>

src/refs.c

@@ -16,6 +16,8 @@
 
 #define MAX_NESTING_LEVEL 5
 
+#define GIT_PACKED_REFS_FILE_MODE 0644
+
 enum {
 	GIT_PACKREF_HAS_PEEL = 1,
 	GIT_PACKREF_WAS_LOOSE = 2
@@ -802,7 +804,7 @@ cleanup:
 	/* if we've written all the references properly, we can commit
 	 * the packfile to make the changes effective */
 	if (error == GIT_SUCCESS) {
-		error = git_filebuf_commit(&pack_file, GIT_PACK_FILE_MODE);
+		error = git_filebuf_commit(&pack_file, GIT_PACKED_REFS_FILE_MODE);
 
 		/* when and only when the packfile has been properly written,
 		 * we can go ahead and remove the loose refs */