release notes/ change number discrepancy ? - Documentation/RelNotes/2.10.0.txt "merge b738396..."

Am I missing something in the following:

looking at Documentation/RelNotes/2.10.0.txt I see the following release
note (~line 35):

 * "upload-pack" allows a custom "git pack-objects" replacement when
   responding to "fetch/clone" via the uploadpack.packObjectsHook.
   (merge b738396 jk/upload-pack-hook later to maint).


but when I run git show b738396 , I get the following:

commit b738396cfdcc276c0cde0c1a6462c5cc74ba7b76
Author: Johannes Schindelin [off-list ref]
Date:   Thu Jul 14 15:58:59 2016 +0200

    mingw: fix regression in t1308-config-set


which seems to be completely unrelated. What am I missing please?

Thanks
Zenaan