$ git clone -n https://src.fedoraproject.org/rpms/netgen.git /var/lib/mock/f40-build-757495-119377/root/chroot_tmpdir/scmroot/netgen
Cloning into '/var/lib/mock/f40-build-757495-119377/root/chroot_tmpdir/scmroot/netgen'...
$ git fetch origin c8691f0b6f12167213bb80667da475e6fd8c4256:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/netgen
 * [new ref]         c8691f0b6f12167213bb80667da475e6fd8c4256 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c8691f0 Set build_type_safety_c to 0 (#2144813)