r the purposes of rev-parse, but which are treated
specially by git.  Pseudorefs both have names that are all-caps,
and always start with a line consisting of a
<a href="#def_SHA1">SHA-1</a> followed by whitespace.  So, HEAD is not a
pseudoref, because it is sometimes a symbolic ref.  They might
optionally contain some additional data.  <code>MERGE_HEAD</code> and
<code>CHERRY_PICK_HEAD</code> are examples.  Unlike
<a href="#def_per_worktree_ref">per-worktree refs</a>, these files cannot
be symbolic refs, a