vim ~/.zshrc

autoload -Uz vcs_info
precmd() {vcs_info}
zstyle ':vcs_info:git:*' formats '(%b)'
setopt PROMPT_SUBST

PROMPT='%F{blue}%~%k%f %F{green}${vcs_info_msg_0_}%f$ '

참고: https://eunhee-programming.tistory.com/302#google_vignette