git-extra: update checksums

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

git-extra/PKGBUILD

@@ -5,7 +5,7 @@ pkgbase="mingw-w64-${_realname}"
 pkgname=($_realname
         "${MINGW_PACKAGE_PREFIX}-${_realname}")
 _ver_base=1.1
-pkgver=1.1.674.3bd5106ab
+pkgver=1.1.676.f684e74d5
 pkgrel=1
 pkgdesc="Git for Windows extra files"
 arch=('any')