I searched in the AUR for pam_u2f-git and nothing came up.
https://aur.archlinux.org/packages/pam_u2f-git/So I wrote my own package (https://github.com/Manouchehri/AUR-pam_u2f-git/blob/master/PKGBUILD), and went to push it... and got denied. Turns out it does exist!
https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=pam_u2f-git Any idea what's going on here?
