vc-do-async-command

vc-do-async-command is a compiled Lisp function in `vc-dispatcher.el'.

(vc-do-async-command BUFFER ROOT COMMAND &rest ARGS)

Run COMMAND asynchronously with ARGS, displaying the result.
Send the output to BUFFER, which should be a buffer or the name
of a buffer, which is created.
ROOT should be the directory in which the command should be run.
Display the buffer in some window, but don't select it.