$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-asultanov2-11439-29746/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-asultanov2-11439-29746/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 26597f4276976f4eb238aa2d0fef3c7e9bb56584:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         26597f4276976f4eb238aa2d0fef3c7e9bb56584 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26597f4 bump release for test build