ation about blobs and trees that already exist in
fast-import&#8217;s memory. This requires a channel from fast-import to the
remote-helper.
If it is advertised in addition to "import", Git establishes a pipe from
fast-import to the remote-helper&#8217;s stdin.
It follows that Git and fast-import are both connected to the
remote-helper&#8217;s stdin. Because Git can send multiple commands to
the remote-helper it is required that helpers that use <em>bidi-import</em>
buffer all <em>import</em> commands of a 