Arch Linux

Description:
In the PKGBUILD _pkghash is not assigned a value and the source entry uses ${pkghash} which is undefined.
This causes makepkg to fail when cloning the source git repo.
Additionally it means the package in the repositories can not have been made from the PKGBUILD in repos/community-x86_64.
Fixing the commit hash to use the 1.6 releases hash the package then fails to build due to changes in avr-libc which are fixed in 1.7 release.

Additional info:
* simavr 1.6-1
* config and/or log files etc.
* link to upstream bug report, if any

Steps to reproduce:
Build package in a clean chroot
==> Retrieving sources...
==> WARNING: Skipping all source file integrity checks.
==> Extracting sources...
-> Creating working copy of simavr git repo...
Cloning into 'simavr'...
done.
fatal: invalid reference:
==> ERROR: Failure while creating working copy of simavr git repo
Aborting...