$ git clone -n https://src.fedoraproject.org/rpms/php-sabre-vobject4.git /var/lib/mock/f40-build-2173756-51063/root/chroot_tmpdir/scmroot/php-sabre-vobject4
Cloning into '/var/lib/mock/f40-build-2173756-51063/root/chroot_tmpdir/scmroot/php-sabre-vobject4'...
$ git fetch origin 04447806313f086b6bd7d08dd7448adc034f0485:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-sabre-vobject4
 * [new ref]         04447806313f086b6bd7d08dd7448adc034f0485 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
Updating files:  40% (2/5)
Updating files:  60% (3/5)
Updating files:  80% (4/5)
Updating files: 100% (5/5)
Updating files: 100% (5/5), done.
HEAD is now at 0444780 v4.5.4