$ git clone -n https://github.com/xcp-ng-rpms/xcp-ng-release /var/lib/mock/v8.3-incoming-9993-28653/root/chroot_tmpdir/scmroot/xcp-ng-release
Cloning into '/var/lib/mock/v8.3-incoming-9993-28653/root/chroot_tmpdir/scmroot/xcp-ng-release'...
$ git fetch origin 89c2f68453ae8639e99ca06c9983523e934d1545:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xcp-ng-release
 * [new ref]         89c2f68453ae8639e99ca06c9983523e934d1545 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 89c2f68 Add timestamps to history (and regen patch queue to align)