`stripHash` documentation states that it prints out the stripped name to
the stdout, but the function stored the value in `strippedName`
instead.
Basically all usages did something like
`$(stripHash $foo | echo $strippedName)` which is just braindamaged.
Fixed the implementation and all invocations.
pin urls to a specific commitish, because in the case the font gets
an update hashes will change on the master and therefore break, as
@zimbatm pointed out in #11574.