fetch: define shallow boundary with --shallow-since

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/transport.c b/transport.c
index c92f8ae..f04a302 100644
--- a/transport.c
+++ b/transport.c
@@ -151,6 +151,9 @@
 				die("transport: invalid depth option '%s'", value);
 		}
 		return 0;
+	} else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
+		opts->deepen_since = value;
+		return 0;
 	}
 	return 1;
 }
@@ -205,6 +208,7 @@
 	args.quiet = (transport->verbose < 0);
 	args.no_progress = !transport->progress;
 	args.depth = data->options.depth;
+	args.deepen_since = data->options.deepen_since;
 	args.check_self_contained_and_connected =
 		data->options.check_self_contained_and_connected;
 	args.cloning = transport->cloning;