$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-asultanov2-11443-29750/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-asultanov2-11443-29750/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin d208e55efbe35fe780173317a4d437383e5ccbfe:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         d208e55efbe35fe780173317a4d437383e5ccbfe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d208e55 bump release for test build