don't initialize vcs if there is no git command

internal/p10k.zsh

@@ -7717,7 +7717,7 @@ _p9k_must_init() {
     [[ $sig == $_p9k__param_sig ]] && return 1
     _p9k_deinit
   fi
-  _p9k__param_pat=$'v93\1'${ZSH_VERSION}$'\1'${ZSH_PATCHLEVEL}$'\1'
+  _p9k__param_pat=$'v94\1'${(q)ZSH_VERSION}$'\1'${(q)ZSH_PATCHLEVEL}$'\1'
   _p9k__param_pat+=$'${#parameters[(I)POWERLEVEL9K_*]}\1${(%):-%n%#}\1$GITSTATUS_LOG_LEVEL\1'
   _p9k__param_pat+=$'$GITSTATUS_ENABLE_LOGGING\1$GITSTATUS_DAEMON\1$GITSTATUS_NUM_THREADS\1'
   _p9k__param_pat+=$'$GITSTATUS_CACHE_DIR\1$GITSTATUS_AUTO_INSTALL\1${ZLE_RPROMPT_INDENT:-1}\1'
@@ -7726,6 +7726,7 @@ _p9k_must_init() {
   _p9k__param_pat+=$'$VTE_VERSION\1$TERM_PROGRAM\1$DEFAULT_USER\1$P9K_SSH\1$commands[uname]\1'
   _p9k__param_pat+=$'$__p9k_root_dir\1$functions[p10k-on-init]$functions[p10k-on-pre-prompt]\1'
   _p9k__param_pat+=$'$functions[p10k-on-post-widget]$functions[p10k-on-post-prompt]\1'
+  _p9k__param_pat+=$'$+commands[git]'
   local MATCH
   IFS=$'\1' _p9k__param_pat+="${(@)${(@o)parameters[(I)POWERLEVEL9K_*]}:/(#m)*/\${${(q)MATCH}-$IFS\}}"
   IFS=$'\2' _p9k__param_sig="${(e)_p9k__param_pat}"
@@ -7969,6 +7970,13 @@ function _p9k_init_cacheable() {
 
 _p9k_init_vcs() {
   _p9k_segment_in_use vcs || return
+  if [[ $#_POWERLEVEL9K_VCS_BACKENDS -le 1 && $_POWERLEVEL9K_VCS_BACKENDS == git &&
+        $+commands[git] == 0 ]]; then
+    (( $+functions[gitstatus_stop_p9k_] )) && gitstatus_stop_p9k_ POWERLEVEL9K
+    unset _p9k_preinit
+    return
+  fi
+
   _p9k_vcs_info_init
   if (( $+functions[_p9k_preinit] )); then
     if (( $+GITSTATUS_DAEMON_PID_POWERLEVEL9K )); then