$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-asultanov2-11453-29757/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-asultanov2-11453-29757/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 089dd9266577ecffd32879151af6d25d1577ed85:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         089dd9266577ecffd32879151af6d25d1577ed85 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 089dd92 bump release for test build