`%(upstream)`, `%(upstream:remotename)`
and `%(upstream:remoteref)` refer to the name of the remote and the
name of the tracked remote ref, respectively. In other words, the
remote-tracking branch can be updated explicitly and individually by
using the refspec `%(upstream:remoteref):%(upstream)` to fetch from
`%(upstream:remotename)`.
+
Has no effect if the ref does not have tracking information associated
with it.  All the options apart from `nobracket` are mutually exclusive,
but if used together the last option is selected.

push::
	The name of a local ref which represents the `@{push}`
	location for the displayed ref. Respects `:short`, `:lstrip`,
	`:rstrip`, `:track`, `:trackshort`, `:remotename`, and `:remoteref`
	options as `upstream` does. Produces an empty string if no `@{push}`
	ref is configured.

HEAD::
	'*' if HEAD matches current ref (the checked out branch), ' '
	otherwise.

color::
	Change output color. Followed by `:<colorname>`, where color
	names are described under Values in the "CONFIGURATION FILE"
	section of linkgit:git-config[1].  For example,
	`%(color:bold red)`.

align::
	Left-, middle-, or right-align the content between
	%(align:...) and %(end). The "align:" is followed by
	`width=<width>` and `position=<position>` in any order
	separated by a comma, where the `<position>` is either left,
	right or middle, default being left and `<width>` is the total
	length of the content with alignment. For brevity, the
	"width=" and/or "position=" prefixes may be omitted, and bare
	<width> and <position> used instead.  For instance,
	`%(align:<width>,<position>)`. If the contents length is more
	than the width then no alignment is performed. If used with
	`--quote` everything in between %(align:...) and %(end) is
	quoted, but if nested then only the topmost level performs
	quoting.

if::
	Used as %(if)...%(then)...%(end) or
	%(if)...%(then)...%(else)...%(end).  If there is an atom with
	value or string literal after the %(if) then everything after
	the %(then) is printed, else if the %(else) atom is used, then
	everything after %(else) is printed. We ignore space when
	evaluating the string before %(then), this is useful when we
	use the %(HEAD) atom which prints either "*" or " " and we
	want to apply the 'if' condition only on the 'HEAD' ref.
	Append ":equals=<string>" or ":notequals=<string>" to compare
	the value between the %(if:...) and %(then) atoms with the
	given string.

symref::
	The ref which the given symbolic ref refers to. If not a
	symbolic ref, nothing is printed. Respects the `:short`,
	`:lstrip` and `:rstrip` options in the same way as `refname`
	above.

signature::
	The GPG signature of a commit.

signature:grade::
	Show "G" for a good (valid) signature, "B" for a bad
	signature, "U" for a good signature with unknown validity, "X"
	for a good signature that has expired, "Y" for a good
	signature made by an expired key, "R" for a good signature
	made by a revoked key, "E" if the signature cannot be
	checked (e.g. missing key) and "N" for no signature.

signature:signer::
	The signer of the GPG signature of a commit.

signature:key::
	The key of the GPG signature of a commit.

signature:fingerprint::
	The fingerprint of the GPG signature of a commit.

signature:primarykeyfingerprint::
	The primary key fingerprint of the GPG signature of a commit.

signature:trustlevel::
	The trust level of the GPG signature of a commit. Possible
	outputs are `ultimate`, `fully`, `marginal`, `never` and `undefined`.

worktreepath::
	The absolute path to the worktree in which the ref is checked
	out, if it is checked out in any linked worktree. Empty string
	otherwise.

ahead-behind:<committish>::
	Two integers, separated by a space, demonstrating the number of
	commits ahead and behind, respectively, when comparing the output
	ref to the `<committish>` specified in the format.

is-base:<committish>::
	In at most one row, `(<committish>)` will appear to indicate the ref
	that is most likely the ref used as a starting