ci: fix git clone depth being too small, and typo in debug msg

Technically this option can be configured in the Gitlab UI, but I spent about 3 hours debugging a CI failure caused by it being too low and I don't want to risk forgetting this can happen later if/when someone decides to lower it in the UI. By setting it here, we can have some context/history about why.

This fixes the CI in !5688 (merged)

Also see: https://docs.gitlab.com/17.4/ee/user/project/repository/monorepos/index.html#shallow-cloning

.ci/lib/common.py

@@ -100,7 +100,7 @@ def get_changed_files(removed=True):
     commit_head = run_git(["rev-parse", "HEAD"])[:-1]
     commit_upstream = run_git(["rev-parse", branch_upstream])[:-1]
     print("commit HEAD: " + commit_head)
-    print(f"commit {branch_upstream}: f{commit_upstream}")
+    print(f"commit {branch_upstream}: {commit_upstream}")
 
     # Check if we are HEAD on the upstream branch
     if commit_head == commit_upstream: