$ git clone -n https://github.com/xcp-ng-rpms/varstored.git /var/lib/mock/v8.3-incoming-10290-28862/root/chroot_tmpdir/scmroot/varstored
Cloning into '/var/lib/mock/v8.3-incoming-10290-28862/root/chroot_tmpdir/scmroot/varstored'...
$ git fetch origin 7fefcf1be6da9c0c80a702991ca5a267d8eef626:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/varstored
 * [new ref]         7fefcf1be6da9c0c80a702991ca5a267d8eef626 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7fefcf1 Merge branch 'XS-8.3' into asv/rebase-290126