Function command_label 

pub fn command_label(command: &Command) -> String

What: The name a run goes by in the lines about it: the program’s file name and its first word that is not an option, as in git push, git fetch or git-lfs push. Why: The wait line must say which of the wrapper’s network runs is waiting, and the command is the only thing that knows. The values of Git’s -c and -C options are skipped with them.

In TS you’d write (pseudocode):

const [program, ...args] = command; return [basename(program), args.find((word) => !word.startsWith('-'))].join(' ');