Hmm ... It's impossible ;-) This RPM doesn't exist on any FTP server

Provides :
cmake(libmamba)
libmamba-devel
libmamba-devel(x86-64)

Requires :

cmake(tl-expected)
cmake-filesystem
cmake-filesystem(x86-64)
fmt-devel(x86-64)
json-devel(x86-64)
libmamba(x86-64) = 1.5.12-1.fc42
libmamba.so.2()(64bit)
libsolv-devel(x86-64)
pkgconfig
reproc-devel(x86-64)
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(PayloadIsZstd) <= 5.4.18-1
spdlog-devel(x86-64)
yaml-cpp-devel(x86-64)

Content of RPM :
/usr/include/mamba
/usr/include/mamba/api
/usr/include/mamba/api/c_api.h
/usr/include/mamba/api/channel_loader.hpp
/usr/include/mamba/api/clean.hpp
/usr/include/mamba/api/config.hpp
/usr/include/mamba/api/configuration.hpp
/usr/include/mamba/api/configuration_impl.hpp
/usr/include/mamba/api/constants.hpp
/usr/include/mamba/api/create.hpp
/usr/include/mamba/api/info.hpp
/usr/include/mamba/api/install.hpp
/usr/include/mamba/api/list.hpp
/usr/include/mamba/api/remove.hpp
/usr/include/mamba/api/repoquery.hpp
/usr/include/mamba/api/shell.hpp
/usr/include/mamba/api/update.hpp
/usr/include/mamba/core
/usr/include/mamba/core/activation.hpp
/usr/include/mamba/core/channel.hpp
/usr/include/mamba/core/common_types.hpp
/usr/include/mamba/core/context.hpp
/usr/include/mamba/core/download.hpp
/usr/include/mamba/core/env_lockfile.hpp
/usr/include/mamba/core/environment.hpp
/usr/include/mamba/core/environments_manager.hpp
/usr/include/mamba/core/error_handling.hpp
/usr/include/mamba/core/execution.hpp
/usr/include/mamba/core/fetch.hpp
/usr/include/mamba/core/fsutil.hpp
There is 66 files more in these RPM.