Re: [PATCH 1/3] t5730: introduce fetch command helper

Kim Altintop [off-list ref] writes:

Perhaps an alternative would be:

	write_fetch_command () {
		write_command fetch &&
		echo "0001" &&
		echo "no-progress" &&
		cat /dev/stdin &&
		echo "done" &&
		echo "0000"
 	}


Which would then be called like so:

	write_fetch_command >pkt_cmd <<-EOF &&
	want-ref refs/heads/main
	have $(git rev-parse a)
	EOF
	test-tool pkt-line pack <pkt_cmd >in &&
	test-tool serve-v2 --stateless-rpc >out <in &&


I'm not sure how portable that is, though. Maybe using `while read -r` instead
of `cat /dev/stdin`?

If you drop /dev/stdin, the result would be emimently portable.
"cat" without any argument reads from the standard input stream
and copies it to the standard output stream.