$ git clone -n https://src.fedoraproject.org/rpms/python-jwcrypto.git /var/lib/mock/f45-build-31229-651/root/chroot_tmpdir/scmroot/python-jwcrypto
Cloning into '/var/lib/mock/f45-build-31229-651/root/chroot_tmpdir/scmroot/python-jwcrypto'...
$ git fetch origin 34c40fb1b238682f4dc5217166836bfb56eaa61e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jwcrypto
 * [new ref]         34c40fb1b238682f4dc5217166836bfb56eaa61e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 34c40fb Update to 1.6.0