Merge branch 'en/object-name-with-funny-refname-fix'

Extended SHA-1 expression parser did not work well when a branch
with an unusual name (e.g. "foo{bar") is involved.

* en/object-name-with-funny-refname-fix:
  object-name: be more strict in parsing describe-like output
  object-name: fix resolution of object names containing curly braces