$ git clone -n https://github.com/xcp-ng-rpms/varstored.git /var/lib/mock/v8.3-u-stormi2-9340-28096/root/chroot_tmpdir/scmroot/varstored
Cloning into '/var/lib/mock/v8.3-u-stormi2-9340-28096/root/chroot_tmpdir/scmroot/varstored'...
$ git fetch origin 040c39a298fcdfd16fccd94431b4fb9f747f76b7:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/varstored
 * [new ref]         040c39a298fcdfd16fccd94431b4fb9f747f76b7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 040c39a bump release for test build