$ git clone -n https://github.com/xcp-ng-rpms/xen.git /var/lib/mock/v8.3-incoming-8835-27776/root/chroot_tmpdir/scmroot/xen
Cloning into '/var/lib/mock/v8.3-incoming-8835-27776/root/chroot_tmpdir/scmroot/xen'...
$ git fetch origin d74fbf7c25bec4e98f3edd80b4c1fa34caa3eb60:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xen
 * [new ref]         d74fbf7c25bec4e98f3edd80b4c1fa34caa3eb60 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d74fbf7 Merge pull request #63 from xcp-ng-rpms/8.3-rebase-XS-20250702