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

Provides :
mingw64(libgtksourceviewmm-3.0-0.dll)
mingw64-gtksourceviewmm3
mingw64-pkgconfig(gtksourceviewmm-3.0)

Requires :

mingw64(kernel32.dll)
mingw64(libatkmm-1.6-1.dll)
mingw64(libcairomm-1.0-1.dll)
mingw64(libgcc_s_seh-1.dll)
mingw64(libgdkmm-3.0-1.dll)
mingw64(libgiomm-2.4-1.dll)
mingw64(libglib-2.0-0.dll)
mingw64(libglibmm-2.4-1.dll)
mingw64(libgobject-2.0-0.dll)
mingw64(libgtk-3-0.dll)
mingw64(libgtkmm-3.0-1.dll)
mingw64(libgtksourceview-3.0-1.dll)
mingw64(libpangomm-1.4-1.dll)
mingw64(libsigc-2.0-0.dll)
mingw64(libstdc++-6.dll)
mingw64(msvcrt.dll)
mingw64-crt
mingw64-filesystem >= 95
mingw64-pkg-config
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(PayloadIsZstd) <= 5.4.18-1

Content of RPM :
/usr/share/licenses/mingw64-gtksourceviewmm3
/usr/share/licenses/mingw64-gtksourceviewmm3/COPYING
/usr/x86_64-w64-mingw32/sys-root/mingw/bin/libgtksourceviewmm-3.0-0.dll
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/buffer.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/completion.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/completionactivation.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/completioncontext.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/completioninfo.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/completionitem.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/completionproposal.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/completionprovider.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/completionwords.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/gutter.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/gutterrenderer.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/gutterrendererpixbuf.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/gutterrenderertext.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/init.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/language.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/languagemanager.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/mark.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/markattributes.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/markup.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/printcompositor.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/private
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/private/buffer_p.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/private/completion_p.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/gtksourceviewmm-3.0/gtksourceviewmm/private/completionactivation_p.h
There is 41 files more in these RPM.