$ git clone -n https://src.fedoraproject.org/rpms/php-yoast-phpunit-polyfills.git /var/lib/mock/f42-build-3224801-41162/root/chroot_tmpdir/scmroot/php-yoast-phpunit-polyfills
Cloning into '/var/lib/mock/f42-build-3224801-41162/root/chroot_tmpdir/scmroot/php-yoast-phpunit-polyfills'...
$ git fetch origin 873502170ee6928f33eddfe901034cebfe615fab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-yoast-phpunit-polyfills
 * [new ref]         873502170ee6928f33eddfe901034cebfe615fab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8735021 update to 4.0.0