$ git clone -n https://src.fedoraproject.org/rpms/php-pecl-dio.git /var/lib/mock/f40-build-733792-105472/root/chroot_tmpdir/scmroot/php-pecl-dio
Cloning into '/var/lib/mock/f40-build-733792-105472/root/chroot_tmpdir/scmroot/php-pecl-dio'...
$ git fetch origin 1d2402ca35b15982d22e8a41c1414bec1aebe5f0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-pecl-dio
 * [new ref]         1d2402ca35b15982d22e8a41c1414bec1aebe5f0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1d2402c build out of sources tree