$ git clone -n https://github.com/xcp-ng-rpms/xcp-ng-deps.git /var/lib/mock/v8.3-incoming-10804-29312/root/chroot_tmpdir/scmroot/xcp-ng-deps
Cloning into '/var/lib/mock/v8.3-incoming-10804-29312/root/chroot_tmpdir/scmroot/xcp-ng-deps'...
$ git fetch origin 68d19560e20d7dc3421e7c1bc11e6bdfcfe7dfc4:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xcp-ng-deps
 * [new ref]         68d19560e20d7dc3421e7c1bc11e6bdfcfe7dfc4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 68d1956 Merge pull request #13 from xcp-ng-rpms/pcoval/review/master