$ git clone -n https://src.fedoraproject.org/rpms/php-pear-MDB2.git /var/lib/mock/f45-build-28327-629/root/chroot_tmpdir/scmroot/php-pear-MDB2
Cloning into '/var/lib/mock/f45-build-28327-629/root/chroot_tmpdir/scmroot/php-pear-MDB2'...
$ git fetch origin eeb9c7e49f8f1dedf5003da3b67eeb1e83b93fc9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-pear-MDB2
 * [new ref]         eeb9c7e49f8f1dedf5003da3b67eeb1e83b93fc9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eeb9c7e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild