git broken for AIX somewhere between 2.13.2 and 2.13.3

[Michael <aixtools@felt.demon.nl>]

Hi,

Several years ago I had downloaded and packaged git-2.10.1 with no real 
issues, and it has been working fine. Deciding it was time for an update 
I downloaded git-2.18.0 and built from scratch.

After testing lots of version - the the last 2.12 version worked; 
git-2.13.2 works but git-2.13.3 does not.

root@x066:[/tmp/xxx]git clone git@github.com:aixtools/hello-world.git
root@x066:[/tmp/xxx]git --version
git version 2.13.2
root@x066:[/tmp/xxx]ls -l
total 0
drwxr-xr-x    3 root     system          256 Jul 29 16:37 hello-world

root@x066:[/tmp/xxx]git --version
git version 2.13.3
root@x066:[/tmp/xxx]git clone git@github.com:aixtools/hello-world.git
Cloning into 'hello-world'...
remote: Counting objects: 3, done.
remote: Total 3 (delta 0), reused 0 (delta 0), pack-reused 3
Receiving objects: 100% (3/3), done.
fatal: pack is corrupted (SHA1 mismatch)
fatal: index-pack failed

p.s. - what surprises me re: git-2.13.2 - no messages about 'Cloning 
into ...', which version 2.13.1 did give.

I guess a bisect is the next step - between version 2.13.2 and 2.13.3. 
Other suggestions welcome!

Michael