Add a run of git remote -v so we learn what "checkout: self" really does. Add echo lines between each command to confirm which command is failing.

azure-pipelines.yml

@@ -244,17 +244,31 @@ jobs:
           artifactName: rustdocs
           targetPath: $(Pipeline.Workspace)/rustdocs
       - bash: |
+          echo a
+          git remote -v
+          echo b
           git checkout --orphan test-branch/fake-gh-pages
+          echo c
           git rm -rf .
+          echo d
           mkdir rustdoc/
+          echo e
           cp -r $(Pipeline.Workspace)/rustdocs/* rustdoc/
+          echo f
           echo '<meta http-equiv="refresh" content="1; url=rustdoc/wasmer_runtime/index.html">' > index.html
+          echo g
           echo '<meta http-equiv="refresh" content="1; url=wasmer_runtime/index.html">' > rustdoc/index.html
+          echo h
           git config --local user.name "Azure Pipelines"
+          echo i
           git config --local user.email "azuredevops@microsoft.com"
+          echo j
           git add .
+          echo k
           git commit -m "Publishing GitHub Pages  ***NO_CI***"
+          echo l
           git push --set-upstream origin test-branch/fake-gh-pages --force
+          echo m
 
 # We only run the pipelines on PRs to Master
 pr: