$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-asultanov2-9008-27907/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-asultanov2-9008-27907/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 69eec802fd172f4dbb2d99dc04301199e79fdcbc:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         69eec802fd172f4dbb2d99dc04301199e79fdcbc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 69eec80 bump release for test build