$ git clone -n https://src.fedoraproject.org/rpms/zabbix6.0.git /var/lib/mock/f39-build-2515906-61728/root/chroot_tmpdir/scmroot/zabbix6.0
Cloning into '/var/lib/mock/f39-build-2515906-61728/root/chroot_tmpdir/scmroot/zabbix6.0'...
$ git fetch origin 2fd56cb75d42ba164ab9fdfdc4fcbf9dbf4c2a4e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zabbix6.0
 * [new ref]         2fd56cb75d42ba164ab9fdfdc4fcbf9dbf4c2a4e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2fd56cb Added the README