$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-asultanov2-11457-29764/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-asultanov2-11457-29764/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin d35439c99451d884e767908fac441001ea5e7cc1:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         d35439c99451d884e767908fac441001ea5e7cc1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d35439c bump release for test build