$ git clone -n https://github.com/xcp-ng-rpms/net-snmp /var/lib/mock/v8.3-incoming-9081-27939/root/chroot_tmpdir/scmroot/net-snmp
Cloning into '/var/lib/mock/v8.3-incoming-9081-27939/root/chroot_tmpdir/scmroot/net-snmp'...
$ git fetch origin cf3378c699d86b0d6608ab90051a8b26c124401a:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/net-snmp
 * [new ref]         cf3378c699d86b0d6608ab90051a8b26c124401a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf3378c Merge branch 'XS-8.3' into 8.3-XS-1557