$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-asultanov2-11610-29902/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-asultanov2-11610-29902/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 55f15ab58038ecc3128ade7caf0d3390b5166c2d:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         55f15ab58038ecc3128ade7caf0d3390b5166c2d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 55f15ab bump release for test build