thodg/libgit2

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f2d5bc7..869794d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -15,6 +15,7 @@ jobs:
       uses: actions/checkout@v2
     - name: Calculate image label
       run: |
+        git log -1 azure-pipelines/docker
         echo "::set-env name=docker-label::libgit2-$(git log -1 --pretty=format:"%h" azure-pipelines/docker)"
     - name: Log in to GitHub Packages
       run: |