clone --single: limit the fetch refspec to fetched branch

diff --git a/RelNotes b/RelNotes
index 509b3f6044d1f0f5091c8e65826747d524ab12d0..d04f1ae46c0477ecd97306db5d76d8f3b60b9415 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes-1.5.3.7.txt
\ No newline at end of file
+Documentation/RelNotes/1.7.11.6.txt
\ No newline at end of file