$ git clone -n https://src.fedoraproject.org/rpms/php-pecl-dio.git /var/lib/mock/f40-build-784931-133668/root/chroot_tmpdir/scmroot/php-pecl-dio
Cloning into '/var/lib/mock/f40-build-784931-133668/root/chroot_tmpdir/scmroot/php-pecl-dio'...
$ git fetch origin 2b7149620eae181a2630112d4fd21a1fdcbf77c8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-pecl-dio
 * [new ref]         2b7149620eae181a2630112d4fd21a1fdcbf77c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2b71496 v0.3.0