diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index cbc7ab89902f..030fb2c9d9cf 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -86,7 +86,6 @@ jobs:
         uses: actions/checkout@v2
         with:
           fetch-depth: 0
-          ref: master
       - name: Setup Node.js
         uses: actions/setup-node@v2
         with:
diff --git a/Dockerfile b/Dockerfile
index fb17e7bfd621..2862f5bfee91 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -19,7 +19,6 @@ RUN apk add curl
 RUN apk add ca-certificates && update-ca-certificates
 
 WORKDIR /
-COPY --from=BACK /go/src/casdoor/.git/refs/heads .git/refs/heads
 COPY --from=BACK /go/src/casdoor/server ./server
 COPY --from=BACK /go/src/casdoor/swagger ./swagger
 COPY --from=BACK /go/src/casdoor/conf/app.conf ./conf/app.conf
@@ -42,7 +41,6 @@ RUN apt update
 RUN apt install -y ca-certificates && update-ca-certificates
 
 WORKDIR /
-COPY --from=BACK /go/src/casdoor/.git/refs/heads .git/refs/heads
 COPY --from=BACK /go/src/casdoor/server ./server
 COPY --from=BACK /go/src/casdoor/swagger ./swagger
 COPY --from=BACK /go/src/casdoor/docker-entrypoint.sh /docker-entrypoint.sh