$ git clone -n https://github.com/xcp-ng-rpms/xcp-ng-release /var/lib/mock/v9.0-u-ydi1-11168-29574/root/chroot_tmpdir/scmroot/xcp-ng-release
Cloning into '/var/lib/mock/v9.0-u-ydi1-11168-29574/root/chroot_tmpdir/scmroot/xcp-ng-release'...
$ git fetch origin 2e274f082e883855b4ab6b3e3115ca2061441227:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xcp-ng-release
 * [new ref]         2e274f082e883855b4ab6b3e3115ca2061441227 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2e274f0 bump release for test build