$ git clone -n https://src.fedoraproject.org/rpms/php-libvirt.git /var/lib/mock/f40-build-733888-105550/root/chroot_tmpdir/scmroot/php-libvirt
Cloning into '/var/lib/mock/f40-build-733888-105550/root/chroot_tmpdir/scmroot/php-libvirt'...
$ git fetch origin be4128d0ecf50a6ecbad2dd784665c005753aec1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-libvirt
 * [new ref]         be4128d0ecf50a6ecbad2dd784665c005753aec1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at be4128d update to 0.5.7