Merge "Replace ci.o.o links with docs.o.o/infra"
diff --git a/zuul/lib/cloner.py b/zuul/lib/cloner.py
index 67e238a..39e2e34 100644
--- a/zuul/lib/cloner.py
+++ b/zuul/lib/cloner.py
@@ -125,9 +125,14 @@
repo = self.cloneUpstream(project, dest)
- repo.reset()
# Ensure that we don't have stale remotes around
repo.prune()
+ # We must reset after pruning because reseting sets HEAD to point
+ # at refs/remotes/origin/master, but `git branch` which prune runs
+ # explodes if HEAD does not point at something in refs/heads.
+ # Later with repo.checkout() we set HEAD to something that
+ # `git branch` is happy with.
+ repo.reset()
indicated_branch = self.branch or self.zuul_branch
if project in self.project_branches: