$ git clone -n https://github.com/xcp-ng-rpms/xapi.git /var/lib/mock/v8.3-incoming-10172-28716/root/chroot_tmpdir/scmroot/xapi
Cloning into '/var/lib/mock/v8.3-incoming-10172-28716/root/chroot_tmpdir/scmroot/xapi'...
$ git fetch origin 825928ab91082bca434b1cceade122cf7d7d9c5c:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xapi
 * [new ref]         825928ab91082bca434b1cceade122cf7d7d9c5c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 825928a Rebuild with openssl-3