$ git clone -n https://src.fedoraproject.org/rpms/php-mikey179-vfsstream.git /var/lib/mock/f41-build-side-1-3085199-39083/root/chroot_tmpdir/scmroot/php-mikey179-vfsstream
Cloning into '/var/lib/mock/f41-build-side-1-3085199-39083/root/chroot_tmpdir/scmroot/php-mikey179-vfsstream'...
$ git fetch origin d6679c508f9af380a84551e8a10d11f1688e3a7f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-mikey179-vfsstream
 * [new ref]         d6679c508f9af380a84551e8a10d11f1688e3a7f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d6679c5 update to 1.6.12