git auto fetch on change directory

plugins/git-auto-fetch/git-auto-fetch.plugin.zsh

@@ -0,0 +1,5 @@
+function git_fetch_on_chpwd {
+  ([[ -d .git ]] && git fetch --all >! ./.git/FETCH_LOG &)
+}
+chpwd_functions=(${chpwd_functions[@]} "git_fetch_on_chpwd")
+unset git_fetch_on_cpwd