git-fetch: fix a bashism (==)

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/git-fetch.sh b/git-fetch.sh
index c0d256c..ff17699 100755
--- a/git-fetch.sh
+++ b/git-fetch.sh
@@ -80,7 +80,7 @@
 rsync_slurped_objects=
 
 rloga="$rloga $remote_nick"
-test "$remote_nick" == "$remote" || rloga="$rloga $remote"
+test "$remote_nick" = "$remote" || rloga="$rloga $remote"
 
 if test "" = "$append"
 then