$ git clone -n https://github.com/xcp-ng-rpms/varstored.git /var/lib/mock/v8.3-incoming-10128-28716/root/chroot_tmpdir/scmroot/varstored
Cloning into '/var/lib/mock/v8.3-incoming-10128-28716/root/chroot_tmpdir/scmroot/varstored'...
$ git fetch origin ed4fe10ba8cd8921ec8c2fdb9a5e83dffb79ff78:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/varstored
 * [new ref]         ed4fe10ba8cd8921ec8c2fdb9a5e83dffb79ff78 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ed4fe10 Rebuild with openssl-3