documentclass{article}
usepackage[T1]{fontenc}
%usepackage[utf8]{inputenc} % not needed for LaTeX from 2018-04-01

usepackage{tipa} % for textgamma

DeclareUnicodeCharacter{1E24}{d{H}}      % uppercase
DeclareUnicodeCharacter{1E25}{d{h}}      % lowercase
DeclareUnicodeCharacter{0263}{textgamma} % no uppercase

begin{document}

ḥarain

Amaziɣ

end{document}