Sorry for the lag, I'll just drop the answer anyway in case it still can be helpful to you or anybody else.

It's actually a oh-my-zsh plugin, called "magic-enter".

I defined MAGIC_ENTER_GIT_COMMAND="git status" and then included the plugin.

You can find a different but similar plugin here: https://github.com/zshzoo/magic-enter/blob/main/magic-enter....