Most/all? counsel commands which can be launched from the minibuffer appear to locally set enable-recursive-minibuffers to avoid a "Command attempted to use minibuffer while in minibuffer" error (e.g., counsel-cd). However, it appears that counsel-git-grep-switch-cmd does not locally set this variable. Thus, when the Emacs configuration does not enable recursive minibuffers, this will prevent the custom git-grep command functionality from working successfully.

Steps to reproduce:

1. Start Emacs via the repository make plain command
2. Clear enable-recursive-minibuffers: M-: (setq enable-recursive-minibuffers nil)
3. Open ivy.el in buffer: C-x C-f ~/git/swiper/ivy.el
4. Start a git-grep search: C-c j
5. Attempt to switch git command: C-c C-m

Error "Command attempted to use minibuffer while in minibuffer" is displayed.