$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v9.0-u-ydi1-11533-29849/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v9.0-u-ydi1-11533-29849/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 65b1ba31b512b4ac264b1a6dbb3588871546c02b:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         65b1ba31b512b4ac264b1a6dbb3588871546c02b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 65b1ba3 bump release for test build