"git-branch -r" shows HEAD symref that points at a remote branch in
  interest of each tracked remote repository.

* "git-branch -v -v" is a new way to get list of names for branches and the
  "upstream" branch for them.

* git-config learned -e option to open an editor to edit the config file
  directly.

* git-clone runs post-checkout hook when run without --no-checkout.

* git-difftool is now part of the officially supported command, primarily
  maintained by David Aguilar.

* git-for-each-ref learned a new "upstream" token.

* git-format-patch can be told to use attachment with a new configuration,
  format.attach.

* git-format-patch can be told to produce deep or shallow message threads.

* git-format-patch can be told to always add sign-off with a configuration
  variable.

* git-format-patch learned format.headers configuration to add extra
  header fields to the output.  This behaviour is similar to the existing
  --add-header=<header> option of the command.

* git-format-patch gives human readable names to the attached files, when
  told to send patches as attachments.

* git-grep learned to highlight the found substrings in color.

* git-imap-send learned to work around Thunderbird's inability to easily
  disable format=flowed with a new configuration, imap.preformattedHTML.

* git-rebase can be told to rebase the series even if your branch is a
  descendant of the commit you are rebasing onto with --force-rebase
  option.

* git-rebase can be told to report diffstat with the --stat option.

* Output from git-remote command has been vastly improved.

* "git remote update --prune $remote" updates from the named remote and
  then prunes stale tracking branches.

* git-send-email learned --confirm option to review the Cc: list before
  sending the messages out.

(developers)

* Test scripts can be run under valgrind.

* Test scripts can be run with installed git.

* Makefile learned 'coverage' option to run the test suites with
  coverage tracking enabled.

* Building the manpages with docbook-xsl between 1.69.1 and 1.71.1 now
  requires setting DOCBOOK_SUPPRESS_SP to work around a docbook-xsl bug.
  This workaround used to be enabled by default, but causes problems
  with newer versions of docbook-xsl.  In addition, there are a few more
  knobs you can tweak to work around issues with various versions of the
  docbook-xsl package.  See comments in Documentation/Makefile for details.

* Support for building and testing a subset of git on a system without a
  working perl has been improved.


Fixes since v1.6.2
------------------

All of the fixes in v1.6.2.X maintenance series are included in this
release, unless otherwise noted.

Here are fixes that this release has, but have not been backported to
v1.6.2.X series.

* "git-apply" rejected a patch that swaps two files (i.e. renames A to B
  and B to A at the same time).  May need to be backported by cherry
  picking d8c81df and then 7fac0ee).

* The initial checkout did not read the attributes from the .gitattribute
  file that is being checked out.

* git-gc spent excessive amount of time to decide if an object appears
  in a locally existing pack (if needed, backport by merging 69e020a).