I copy and pasted an git clone command from a web page: https://fedorahosted.org/ibus-typing-booster/
I got this:
user@host> git clone http://gi
Mostly it is due to some invisible unicode characters which can come if you hit "Ctrl+V" or "Ctrl+Shift+V" in the terminal. Don't copy and paste the whole command. Instead , type git clone and then copy and paste the url using Right Click + Paste.