If you want to remove MINGW64
word on the Git Bash, you can use this script to replace the original script.
Follow the steps belong using Git Bash.
Run as Administrator
git clone https://github.com/MMuslimAbdulJ/Gitbash-Remove-MINGW64.git
mv /c/Program\ Files/Git/etc/profile.d/git-prompt.sh /c/Program\ Files/Git/etc/profile.d/git-prompt.sh.bak
cp Gitbash-Remove-MINGW64/git-prompt.sh /c/Program\ Files/Git/etc/profile.d/
rm -rf /c/Program\ Files/Git/etc/profile.d/git-prompt.sh
mv /c/Program\ Files/Git/etc/profile.d/git-prompt.sh.bak /c/Program\ Files/Git/etc/profile.d/git-prompt.sh