$ git clone -n https://src.fedoraproject.org/rpms/php-simplepie.git /var/lib/mock/f45-build-28380-629/root/chroot_tmpdir/scmroot/php-simplepie
Cloning into '/var/lib/mock/f45-build-28380-629/root/chroot_tmpdir/scmroot/php-simplepie'...
$ git fetch origin 97b4248fb3ca0f11869b9032d7a78d076938b6c3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-simplepie
 * [new ref]         97b4248fb3ca0f11869b9032d7a78d076938b6c3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 97b4248 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild