$ git clone -n https://github.com/xcp-ng-rpms/xcp-ng-linstor.git /var/lib/mock/v8.3-v-linstor-testing-10194-28771/root/chroot_tmpdir/scmroot/xcp-ng-linstor
Cloning into '/var/lib/mock/v8.3-v-linstor-testing-10194-28771/root/chroot_tmpdir/scmroot/xcp-ng-linstor'...
$ git fetch origin 5e31cd83b2a1ab6595246e8116e9624e78978240:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xcp-ng-linstor
 * [new ref]         5e31cd83b2a1ab6595246e8116e9624e78978240 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e31cd8 Merge pull request #8 from xcp-ng-rpms/trigger-drbd-reactor