$ git clone -n https://github.com/xcp-ng-rpms/xen.git /var/lib/mock/v8.3-incoming-9330-28084/root/chroot_tmpdir/scmroot/xen
Cloning into '/var/lib/mock/v8.3-incoming-9330-28084/root/chroot_tmpdir/scmroot/xen'...
$ git fetch origin 7c098c95965db1f4270f580bdebde2303bc2c865:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xen
 * [new ref]         7c098c95965db1f4270f580bdebde2303bc2c865 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c098c9 Merge branch 'XS-8.3' into 8.3-rebase-XS-20250901