$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-asultanov2-11340-29655/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-asultanov2-11340-29655/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 0890fc1e1505b16c491090e36643852f27048b7f:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         0890fc1e1505b16c491090e36643852f27048b7f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0890fc1 bump release for test build