Use custom clone step with domestic git image

.drone.yml

@@ -2,6 +2,9 @@ kind: pipeline
 type: docker
 name: backend-docker
 
+clone:
+  disable: true
+
 trigger:
   branch:
     - docker
@@ -9,6 +12,14 @@ trigger:
     - push
 
 steps:
+  - name: clone
+    image: docker.m.daocloud.io/alpine/git:2.45.2
+    commands:
+      - git init
+      - git remote add origin http://gitea.cdchen.cloud/${DRONE_REPO}.git
+      - git fetch --depth=50 origin ${DRONE_COMMIT_BRANCH}
+      - git checkout -qf ${DRONE_COMMIT_SHA}
+
   - name: build-image
     image: docker.m.daocloud.io/library/docker:27-cli
     volumes: