$ git clone -n https://src.fedoraproject.org/rpms/php-pecl-ds.git /var/lib/mock/f41-build-808534-145919/root/chroot_tmpdir/scmroot/php-pecl-ds
Cloning into '/var/lib/mock/f41-build-808534-145919/root/chroot_tmpdir/scmroot/php-pecl-ds'...
$ git fetch origin 8ec725563fa7771de729c3fdfe5d6ce47f1750b1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-pecl-ds
 * [new ref]         8ec725563fa7771de729c3fdfe5d6ce47f1750b1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ec7255 drop 32-bit support