Improve git repository reset.

gitlab-ci/src/gitlab-ci.ts

@@ -343,6 +343,7 @@ function objectFromVersion(
 
 async function resetGitRepository() {
   // Reset current repo, because it may have been tranformed by a previous CI that failed.
+  await $`git reset --hard`
   await $`git switch ${CI_COMMIT_BRANCH}`
   await $`git fetch origin ${CI_COMMIT_BRANCH}`
   await $`git reset --hard origin/${CI_COMMIT_BRANCH}`