$ git clone -n https://src.fedoraproject.org/rpms/R-quadprog.git /var/lib/mock/f42-build-side-1-3501292-45974/root/chroot_tmpdir/scmroot/R-quadprog
Cloning into '/var/lib/mock/f42-build-side-1-3501292-45974/root/chroot_tmpdir/scmroot/R-quadprog'...
$ git fetch origin 09fb61051dd07497951acd2ee07f04077f1f4824:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-quadprog
 * [new ref]         09fb61051dd07497951acd2ee07f04077f1f4824 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 09fb610 R-maint-sig mass rebuild