$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-asultanov2-10514-29067/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-asultanov2-10514-29067/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 41e9dd7c574da7289b799c0bc933e1ece3efd42e:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         41e9dd7c574da7289b799c0bc933e1ece3efd42e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 41e9dd7 bump release for test build