Revert "Use '--long' arg with 'git describe'"

This reverts commit f827791.

lib.Makefile

@@ -252,7 +252,7 @@ ifeq ($(GIT_USE_SSH),true)
 endif
 
 # Get version from git.
-GIT_VERSION:=$(shell git describe --tags --dirty --long --always --abbrev=12)
+GIT_VERSION:=$(shell git describe --tags --dirty --always --abbrev=12)
 
 # Figure out version information.  To support builds from release tarballs, we default to
 # <unknown> if this isn't a git checkout.
@@ -262,7 +262,7 @@ BUILD_ID:=$(shell git rev-parse HEAD || uuidgen | sed 's/-//g')
 # Lazily set the git version we embed into the binaries we build. We want the
 # git tag at the time we build the binary.
 # Variables elsewhere that depend on this (such as LDFLAGS) must also be lazy.
-GIT_DESCRIPTION=$(shell git describe --tags --dirty --long --always --abbrev=12 || echo '<unknown>')
+GIT_DESCRIPTION=$(shell git describe --tags --dirty --always --abbrev=12 || echo '<unknown>')
 
 # Calculate a timestamp for any build artefacts.
 ifneq ($(OS),Windows_NT)