$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-asultanov2-10506-29056/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-asultanov2-10506-29056/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 86571c5e3ccbd43ed97476f5263441b28866db4d:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         86571c5e3ccbd43ed97476f5263441b28866db4d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86571c5 bump release for test build