$ git clone -n https://github.com/xcp-ng-rpms/qemu-dp.git /var/lib/mock/v8.3-incoming-11544-29855/root/chroot_tmpdir/scmroot/qemu-dp
Cloning into '/var/lib/mock/v8.3-incoming-11544-29855/root/chroot_tmpdir/scmroot/qemu-dp'...
$ git fetch origin 97a35cdf3f04ec67100efad415ded940837c9b0a:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/qemu-dp
 * [new ref]         97a35cdf3f04ec67100efad415ded940837c9b0a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 97a35cd Merge branch 'XS-8.3' into 'XCPNG-2440/8.3'