$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-incoming-9386-28139/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-incoming-9386-28139/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 63cc814e8d748874a60fbfd9efef61506256555d:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         63cc814e8d748874a60fbfd9efef61506256555d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 63cc814 Remove dependencies on unused components