objects is acyclic (there is no chain which begins and ends with the
same object).
+dangling object::
+ An unreachable object which is not reachable even from other
+ unreachable objects; a dangling object has no references to it
+ from any reference or object in the repository.
+
dircache::
You are *waaaaay* behind.
SHA1::
Synonym for object name.
+shallow repository::
+ A shallow repository has an incomplete history some of
+ whose commits have parents cauterized away (in other
+ words, git is told to pretend that these commits do not
+ have the parents, even though they are recorded in the
+ commit object). This is sometimes useful when you are
+ interested only in the recent history of a project even
+ though the real history recorded in the upstream is
+ much larger. A shallow repository is created by giving
+ `--depth` option to gitlink:git-clone[1], and its
+ history can be later deepened with gitlink:git-fetch[1].
+
symref::
Symbolic reference: instead of containing the SHA1 id itself, it
is of the format 'ref: refs/some/thing' and when referenced, it
unmerged index::
An index which contains unmerged index entries.
+unreachable object::
+ An object which is not reachable from a branch, tag, or any
+ other reference.
+
working tree::
The set of files and directories currently being worked on,
i.e. you can work in your working tree without using git at all.