$ git clone -n https://github.com/xcp-ng-rpms/varstored.git /var/lib/mock/v8.3-incoming-10260-28831/root/chroot_tmpdir/scmroot/varstored
Cloning into '/var/lib/mock/v8.3-incoming-10260-28831/root/chroot_tmpdir/scmroot/varstored'...
$ git fetch origin 45c41e3ceff82762fb088c3002a3fe314920f8aa:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/varstored
 * [new ref]         45c41e3ceff82762fb088c3002a3fe314920f8aa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 45c41e3 Merge branch 'XS-8.3' into asv/rebase-290126