devenv 2.3.1 always runs git-hooks at startup

Describe the bug

devenv shell 2.3.1 always runs git-hooks at startup, requiring about 15 seconds for the shell to be ready to accept further commands. devenv 2.2.2 did not do this.

To reproduce

Run "devenv shell" against https://github.com/mcdonc/klangk/tree/before-githook-workaround with 2.2.2 (no git hooks run at startup), then with 2.3.1 (git hooks runs at startup).

See https://github.com/mcdonc/klangk/issues/3444 for the full analysis and a workaround.