$ git clone -n https://github.com/xcp-ng-rpms/qemu /var/lib/mock/v9.0-u-ydi1-11550-29860/root/chroot_tmpdir/scmroot/qemu
Cloning into '/var/lib/mock/v9.0-u-ydi1-11550-29860/root/chroot_tmpdir/scmroot/qemu'...
$ git fetch origin 6e9f1cbca52b4bb24395f19992302ceda4f26fe8:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/qemu
 * [new ref]         6e9f1cbca52b4bb24395f19992302ceda4f26fe8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e9f1cb bump release for test build