$ git clone -n https://github.com/xcp-ng-rpms/kernel.git /var/lib/mock/v8.3-incoming-9997-28655/root/chroot_tmpdir/scmroot/kernel
Cloning into '/var/lib/mock/v8.3-incoming-9997-28655/root/chroot_tmpdir/scmroot/kernel'...
$ git fetch origin bd20af84967fcb8a7ad341ad2f778899a5e04da5:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/kernel
 * [new ref]             bd20af84967fcb8a7ad341ad2f778899a5e04da5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bd20af849 Merge pull request #23 from xcp-ng-rpms/QC-XCPNG-2654