$ git clone -n https://src.fedoraproject.org/rpms/ngspice.git /var/lib/mock/f40-build-2265509-54605/root/chroot_tmpdir/scmroot/ngspice
Cloning into '/var/lib/mock/f40-build-2265509-54605/root/chroot_tmpdir/scmroot/ngspice'...
$ git fetch origin 935d270f73e58823100c4b2ada242a4541d32ae5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ngspice
 * [new ref]         935d270f73e58823100c4b2ada242a4541d32ae5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 935d270 upload source