git-clone: fix dumb protocol transport to clone from pack-pruned ref

This forward-ports a fix from 2986c022 to git-clone.

Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/git-clone.sh b/git-clone.sh
index 513b574..cad5c0c 100755
--- a/git-clone.sh
+++ b/git-clone.sh
@@ -60,7 +60,7 @@
 		else
 			tname=$name
 		fi
-		git-http-fetch $v -a -w "$tname" "$name" "$1" || exit 1
+		git-http-fetch $v -a -w "$tname" "$sha1" "$1" || exit 1
 	done <"$clone_tmp/refs"
 	rm -fr "$clone_tmp"
 	http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD" ||