$ git clone -n https://src.fedoraproject.org/rpms/php-pear-DB.git /var/lib/mock/f40-build-2255501-54255/root/chroot_tmpdir/scmroot/php-pear-DB
Cloning into '/var/lib/mock/f40-build-2255501-54255/root/chroot_tmpdir/scmroot/php-pear-DB'...
$ git fetch origin 3a1ef42482863fefda90d364d71a9b8b85bc247e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-pear-DB
 * [new ref]         3a1ef42482863fefda90d364d71a9b8b85bc247e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3a1ef42 deprecated