$ git clone -n https://src.fedoraproject.org/rpms/rubygem-net-scp.git /var/lib/mock/f45-build-35052-693/root/chroot_tmpdir/scmroot/rubygem-net-scp
Cloning into '/var/lib/mock/f45-build-35052-693/root/chroot_tmpdir/scmroot/rubygem-net-scp'...
$ git fetch origin 644976696f8748d0f1bbc7e05b0c33dcd3b639c6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-net-scp
 * [new ref]         644976696f8748d0f1bbc7e05b0c33dcd3b639c6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6449766 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild