diff --git a/.gitea/workflows/release.yml b/.gitea/workflows/release.yml
index 8553274..f60f8bc 100644
--- a/.gitea/workflows/release.yml
+++ b/.gitea/workflows/release.yml
@@ -35,6 +35,10 @@ on:
 jobs:
   build-release:
     runs-on: ubuntu-latest
+    env:
+      # 仓库使用 SHA-256 对象格式，actions/checkout 内部 `git init` 需在此模式下运行，否则 fetch 会报
+      # `mismatched algorithms: client sha1; server sha256`。
+      GIT_DEFAULT_HASH: sha256
     steps:
       - name: Checkout (full history)
         uses: actions/checkout@v4