-u, \--update-head-ok::
By default `git-fetch` refuses to update the head which
corresponds to the current branch. This flag disables the
- check. Note that fetching into the current branch will not
- update the index and working directory, so use it with care.
+ check. This is purely for the internal use for `git-pull`
+ to communicate with `git-fetch`, and unless you are
+ implementing your own Porcelain you are not supposed to
+ use it.
+
+\--depth=<depth>::
+ Deepen the history of a 'shallow' repository created by
+ `git clone` with `--depth=<depth>` option (see gitlink:git-clone[1])
+ by the specified number of commits.