The thirteenth batch

Signed-off-by: Taylor Blau <me@ttaylorr.com>

Documentation/RelNotes/2.39.0.txt

@@ -32,6 +32,9 @@ UI, Workflows & Features
  * Enable gc.cruftpacks by default for those who opt into
    feature.experimental setting.
 
+ * "git repack" learns to send cruft objects out of the way into
+   packfiles outside the repository.
+
 Performance, Internal Implementation, Development Support etc.
 --------------------------------------------------------------
 
@@ -109,6 +112,18 @@ Performance, Internal Implementation, Development Support etc.
 
  * Modernize test script to avoid "test -f" and friends.
 
+ * Avoid calling 'cache_tree_update()' when doing so would be
+   redundant.
+
+ * Update the credential-cache documentation to provide a more
+   realistic example.
+
+ * Makefile comments updates and reordering to clarify knobs used to
+   choose SHA implementations.
+
+ * A design document for sparse-checkout's future directions has been
+   added.
+
 Fixes since v2.38
 -----------------
 
@@ -250,6 +265,12 @@ Fixes since v2.38
  * "git archive" mistakenly complained twice about a missing
    executable, which has been corrected.
 
+ * Fix a bug where `git branch -d` did not work on an orphaned HEAD.
+
+ * `git rebase --update-refs` would delete references when all
+   `update-ref` commands in the sequencer were removed, which has been
+   corrected.
+
  * Other code cleanup, docfix, build fix, etc.
    (merge 413bc6d20a ds/cmd-main-reorder later to maint).
    (merge 8d2863e4ed nw/t1002-cleanup later to maint).