$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-asultanov2-9236-28023/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-asultanov2-9236-28023/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin ba79934e51232f489476205c43fff9605e369bb9:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         ba79934e51232f489476205c43fff9605e369bb9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ba79934 bump release for test build