grep: do not unnecessarily query repo for "--"

diff --git a/git.c b/git.c
index 1cf125cd2800df74759b8762c5ea01ede13c6938..c887272b129968db161a152ce8a91aca4439ca3c 100644 (file)
--- a/git.c
+++ b/git.c
@@ -472,7 +472,7 @@ static struct cmd_struct commands[] = {
        { "prune-packed", cmd_prune_packed, RUN_SETUP },
        { "pull", cmd_pull, RUN_SETUP | NEED_WORK_TREE },
        { "push", cmd_push, RUN_SETUP },
-       { "read-tree", cmd_read_tree, RUN_SETUP },
+       { "read-tree", cmd_read_tree, RUN_SETUP | SUPPORT_SUPER_PREFIX},
        { "receive-pack", cmd_receive_pack },
        { "reflog", cmd_reflog, RUN_SETUP },
        { "remote", cmd_remote, RUN_SETUP },