$ git clone -n https://src.fedoraproject.org/rpms/libsbml.git /var/lib/mock/f42-build-side-1-3501716-45976/root/chroot_tmpdir/scmroot/libsbml
Cloning into '/var/lib/mock/f42-build-side-1-3501716-45976/root/chroot_tmpdir/scmroot/libsbml'...
$ git fetch origin 0d50a141b2d4877850d19e242d3f8d9b5c423f51:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libsbml
 * [new ref]         0d50a141b2d4877850d19e242d3f8d9b5c423f51 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0d50a14 R-maint-sig mass rebuild