$ git clone -n https://github.com/xcp-ng-rpms/qemu.git /var/lib/mock/v8.3-incoming-10282-28857/root/chroot_tmpdir/scmroot/qemu
Cloning into '/var/lib/mock/v8.3-incoming-10282-28857/root/chroot_tmpdir/scmroot/qemu'...
$ git fetch origin c74dd619dae494e74f2b9f8bfa044d33f3bb8835:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/qemu
 * [new ref]         c74dd619dae494e74f2b9f8bfa044d33f3bb8835 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c74dd61 Merge remote-tracking branch 'origin/master' into QC-XCPNG-2834