$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-u-asultanov2-11388-29695/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-u-asultanov2-11388-29695/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 6f1eb9f58749e59dc8c4b5d93ad8e62ea6a7272b:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         6f1eb9f58749e59dc8c4b5d93ad8e62ea6a7272b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f1eb9f bump release for test build