The name of the ref (the part after $GIT_DIR/).
For a non-ambiguous short name of the ref append `:short`.
The option core.warnAmbiguousRefs is used to select the strict
- abbreviation mode.
+ abbreviation mode. If `strip=<N>` is appended, strips `<N>`
+ slash-separated path components from the front of the refname
+ (e.g., `%(refname:strip=2)` turns `refs/tags/foo` into `foo`.
+ `<N>` must be a positive integer. If a displayed ref has fewer
+ components than `<N>`, the command aborts with an error.
objecttype::
The type of the object (`blob`, `tree`, `commit`, `tag`).