$ git clone -n https://src.fedoraproject.org/rpms/php-phpmailer6.git /var/lib/mock/f42-build-59163534-6571348/root/chroot_tmpdir/scmroot/php-phpmailer6
Cloning into '/var/lib/mock/f42-build-59163534-6571348/root/chroot_tmpdir/scmroot/php-phpmailer6'...
$ git fetch origin e447472b9a13b86d21da03f258e029210da9b456:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-phpmailer6
 * [new ref]         e447472b9a13b86d21da03f258e029210da9b456 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e447472 update to 6.10.0