diff --git a/.github/workflows/commit-check.yml b/.github/workflows/commit-check.yml
index 90332a2..9706813 100644
--- a/.github/workflows/commit-check.yml
+++ b/.github/workflows/commit-check.yml
@@ -16,6 +16,8 @@ jobs:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           fetch-depth: 0  # Required for merge-base checks
+          # Nothing after checkout needs authenticated git.
+          persist-credentials: false
       - uses: commit-check/commit-check-action@bcbadb3fec596872bcae51074d8fdbea15c02ba5 # v2.18.0
         with:
           message: true
diff --git a/.github/workflows/pre-commit.yml b/.github/workflows/pre-commit.yml
index 309a2eb..981fb3b 100644
--- a/.github/workflows/pre-commit.yml
+++ b/.github/workflows/pre-commit.yml
@@ -20,6 +20,10 @@ jobs:
       contents: read
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          # The hooks are other people's code, and none of them needs
+          # authenticated git: leave the token out of .git/config.
+          persist-credentials: false
       - uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
         id: python-setup
         with: