Remove duplicate ref matches in fetch

If multiple refspecs matched the same ref, the update would be
processed multiple times. Now having the same destination for the same
source has no additional effect, and having the same destination for
different sources is an error.

Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/builtin-fetch.c b/builtin-fetch.c
index cf7498b15..caaca6364 100644
--- a/builtin-fetch.c
+++ b/builtin-fetch.c
@@ -112,6 +112,7 @@ static struct ref *get_ref_map(struct transport *transport,
 			ref_map->merge = 1;
 		}
 	}
+	ref_remove_duplicates(ref_map);
 
 	return ref_map;
 }