$ git clone -n https://src.fedoraproject.org/rpms/mingw-jasper.git /var/lib/mock/f45-build-18500-519/root/chroot_tmpdir/scmroot/mingw-jasper
Cloning into '/var/lib/mock/f45-build-18500-519/root/chroot_tmpdir/scmroot/mingw-jasper'...
$ git fetch origin 9361498e022b81f81a995893b20129447d8e94a1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-jasper
 * [new ref]         9361498e022b81f81a995893b20129447d8e94a1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9361498 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild