Why does gpg.program work for commit but not log?

["Jason Pyeron" <jpyeron@pdinc.us>]

jpyeron@black /projects/microsoft-smartcard-sign/tmp
$ git --version
git version 1.7.9
jpyeron@black /projects/microsoft-smartcard-sign/tmp
$ GIT_TRACE=1 git commit -S -m 'bin'
trace: built-in: git 'commit' '-S' '-m' 'bin'
trace: run_command: '/projects/microsoft-smartcard-sign/tmp/bin/logginggpg.sh'
'-bsau' 'Jason Pyeron <jpyeron+test3@pdinc.us>'
gpg: WARNING: using insecure memory!
gpg: please see http://www.gnupg.org/documentation/faqs.html for more
information

You need a passphrase to unlock the secret key for
user: "Jason Pyeron <jpyeron+test3@pdinc.us>"
2048-bit RSA key, ID 54D0E8E4, created 2014-06-18

[master 38afa1f] bin
 1 files changed, 19 insertions(+), 0 deletions(-)
 create mode 100755 bin/logginggpg.sh

jpyeron@black /projects/microsoft-smartcard-sign/tmp
$ GIT_TRACE=1 git log --show-signature
trace: built-in: git 'log' '--show-signature'
trace: run_command: 'less'
trace: exec: 'less'
trace: run_command: 'gpg' '--verify' '/tmp/.git_vtag_tmpNLFqtm' '-'
commit 38afa1f4d0c73fd47d5788310a1a2080aa0abbba
gpg: WARNING: using insecure memory!
gpg: please see http://www.gnupg.org/documentation/faqs.html for more
information
gpg: Signature made Wed, Jun 18, 2014  0:11:40 EDT using RSA key ID 54D0E8E4
gpg: Good signature from "Jason Pyeron <jpyeron+test3@pdinc.us>"
Author: Jason Pyeron <jpyeron+test3@pdinc.us>
Date:   Wed Jun 18 00:11:40 2014 -0400

    bin
trace: run_command: 'gpg' '--verify' '/tmp/.git_vtag_tmp41t6O6' '-'

commit 174d4544627883c4b03a9b888c2d2c127accefa5
gpg: WARNING: using insecure memory!
gpg: please see http://www.gnupg.org/documentation/faqs.html for more
information
gpg: Signature made Wed, Jun 18, 2014  0:08:39 EDT using RSA key ID 54D0E8E4
gpg: Good signature from "Jason Pyeron <jpyeron+test3@pdinc.us>"
Author: Jason Pyeron <jpyeron+test3@pdinc.us>
Date:   Wed Jun 18 00:08:39 2014 -0400

    loged signed commit
trace: run_command: 'gpg' '--verify' '/tmp/.git_vtag_tmpo6b0D3' '-'

commit 4f7ad8a8f38b06d675ac5196c80b1a26ecbee433
gpg: WARNING: using insecure memory!
gpg: please see http://www.gnupg.org/documentation/faqs.html for more
information
gpg: Signature made Tue, Jun 17, 2014 23:18:01 EDT using RSA key ID 54D0E8E4
gpg: Good signature from "Jason Pyeron <jpyeron+test3@pdinc.us>"
Author: Jason Pyeron <jpyeron+test3@pdinc.us>
Date:   Tue Jun 17 23:17:55 2014 -0400

    test signed commit

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- Jason Pyeron                      PD Inc. http://www.pdinc.us -
- Principal Consultant              10 West 24th Street #100    -
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