$ git clone -n https://github.com/xcp-ng-rpms/xcp-ng-release /var/lib/mock/v9.0-u-ydi1-10904-29398/root/chroot_tmpdir/scmroot/xcp-ng-release
Cloning into '/var/lib/mock/v9.0-u-ydi1-10904-29398/root/chroot_tmpdir/scmroot/xcp-ng-release'...
$ git fetch origin 9415865e32050d337b3913052801d9631072040a:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xcp-ng-release
 * [new ref]         9415865e32050d337b3913052801d9631072040a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9415865 bump release for test build