$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-asultanov2-9883-28596/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-asultanov2-9883-28596/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 09671e0c0f94f5731405626fec97c9fc37d2a4c9:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         09671e0c0f94f5731405626fec97c9fc37d2a4c9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 09671e0 bump release for test build