ABOhiccups [1] filed a deletion request for mgetty [2]:

mgetty won't install.

Can you change the source link?

Before = source=(http://fossies.org/unix/misc/$pkgname$pkgver- Jun05.tar.gz)

After = source=("http://fossies.org/linux/misc/old/$pkgname$pkgver- Jun05.tar.gz")

[1] https://aur.archlinux.org/account/ABOhiccups/ [2] https://aur.archlinux.org/pkgbase/mgetty/