$ git clone -n https://github.com/xcp-ng-rpms/xcp-ng-release /var/lib/mock/v9.0-u-ydi1-10848-29354/root/chroot_tmpdir/scmroot/xcp-ng-release
Cloning into '/var/lib/mock/v9.0-u-ydi1-10848-29354/root/chroot_tmpdir/scmroot/xcp-ng-release'...
$ git fetch origin 6d7dec17baeb704b72f15551efb40e76aaf6eeea:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xcp-ng-release
 * [new ref]         6d7dec17baeb704b72f15551efb40e76aaf6eeea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6d7dec1 bump release for test build