$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-asultanov2-11448-29756/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-asultanov2-11448-29756/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 16f0924cfdef17f75c9d2e5c16542743157813c8:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         16f0924cfdef17f75c9d2e5c16542743157813c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 16f0924 bump release for test build