$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-asultanov2-11405-29717/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-asultanov2-11405-29717/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin ab0ba490b4936288b34c5df83b21c490c582edc3:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         ab0ba490b4936288b34c5df83b21c490c582edc3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ab0ba49 bump release for test build