$ git clone -n https://src.fedoraproject.org/rpms/cppad.git /var/lib/mock/f40-build-2226057-52896/root/chroot_tmpdir/scmroot/cppad
Cloning into '/var/lib/mock/f40-build-2226057-52896/root/chroot_tmpdir/scmroot/cppad'...
$ git fetch origin 592496bf4b1cc26796dd02bf37524f3be8a83b34:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cppad
 * [new ref]         592496bf4b1cc26796dd02bf37524f3be8a83b34 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 592496b Fix some errors on 32 bit systems. Improve parallel build.