Lists the capabilities of the helper, one per line, ending with a blank line. Each capability may be preceded with *, which marks them mandatory for Git versions using the remote helper to understand. Any unknown mandatory capability is a fatal error.

Lists the refs, one per line, in the format "<value> <name> [<attr> …​]". The value may be a hex sha1 hash, "@<dest>" for a symref, or "?" to indicate that the helper could not get the value of the ref. A space-separated list of attributes follows the name; unrecognized attributes are ignored. The list ends with a blank line.

Similar to list, except that it is used if and only if the caller wants to the resulting ref list to prepare push commands. A helper supporting both push and fetch can use this to distinguish for which operation the output of list is going to be used, possibly reducing the amount of work that needs to be performed.

Sets the transport helper option <name> to <value>. Outputs a single line containing one of ok (option successfully set), unsupported (option not recognized) or error <msg> (option <name> is supported but <value> is not valid for it). Options should be set before other commands, and may influence the behavior of those commands.

Fetches the given object, writing the necessary objects to the database. Fetch commands are sent in a batch, one per line, terminated with a blank line. Outputs a single blank line when all fetch commands in the same batch are complete. Only objects which were reported in the output of list with a sha1 may be fetched this way.

Pushes the given local <src> commit or branch to the remote branch described by <dst>. A batch sequence of one or more push commands is terminated with a blank line (if there is only one reference to push, a single push command is followed by a blank line). For example, the following would be two batches of push, the first asking the remote-helper to push the local ref master to the remote ref master and the local HEAD to the remote branch, and the second asking to push ref foo to ref bar (forced update requested by the +).

push refs/heads/master:refs/heads/master
push HEAD:refs/heads/branch
\n
push +refs/heads/foo:refs/heads/bar
\n

Produces a fast-import stream which imports the current value of the named ref. It may additionally import other refs as needed to construct the history efficiently. The script writes to a helper-specific private namespace. The value of the named ref should be written to a location in this namespace derived by applying the refspecs from the "refspec" capability to the name of the ref.

Instructs the remote helper that any subsequent input is part of a fast-import stream (generated by git fast-export) containing objects which should be pushed to the remote.

Connects to given service. Standard input and standard output of helper are connected to specified service (git prefix is included in service name so e.g. fetching uses git-upload-pack as service) on remote side. Valid replies to this command are empty line (connection established), fallback (no smart transport support, fall back to dumb transports) and just exiting with error message printed (can’t connect, don’t bother trying to fall back). After line feed terminating the positive (empty) response, the output of service starts. After the connection ends, the remote helper exits.

Experimental; for internal use only. Connects to the given remote service for communication using git’s wire-protocol version 2. Valid replies to this command are empty line (connection established), fallback (no smart transport support, fall back to dumb transports) and just exiting with error message printed (can’t connect, don’t bother trying to fall back). After line feed terminating the positive (empty) response, the output of the service starts. Messages (both request and response) must consist of zero or more PKT-LINEs, terminating in a flush packet. The client must not expect the server to store any state in between request-response pairs. After the connection ends, the remote helper exits.

This ref is unchanged since the last import or fetch, although the helper cannot necessarily determine what value that produced.

Changes the verbosity of messages displayed by the helper. A value of 0 for <n> means that processes operate quietly, and the helper produces only error output. 1 is the default level of verbosity, and higher values of <n> correspond to the number of -v flags passed on the command line.

Enables (or disables) progress messages displayed by the transport helper during a command.

Deepens the history of a shallow repository.

Deepens the history of a shallow repository based on time.

Deepens the history of a shallow repository excluding ref. Multiple options add up.

Deepens the history of a shallow repository relative to current boundary. Only valid when used with "option depth".

If enabled the helper should automatically fetch annotated tag objects if the object the tag points at was transferred during the fetch command. If the tag is not fetched by the helper a second fetch command will usually be sent to ask for the tag specifically. Some helpers may be able to use this option to avoid a second network connection.

Sets service path (--upload-pack, --receive-pack etc.) for next connect. Remote helper may support this option, but must not rely on this option being set before connect request occurs.

Request the helper to check connectivity of a clone.

Request the helper to perform a force update. Defaults to false.

Notify the helper this is a clone request (i.e. the current repository is guaranteed empty).

Allow to extend .git/shallow if the new refs require it.

GPG sign pushes.

Transmit <string> as a push option. As the push option must not contain LF or NUL characters, the string is not encoded.

Indicate that these objects are being fetched from a promisor.

Indicate that only the objects wanted need to be fetched, not their dependents.