fix pgp key fetching and indentation

Makefile

@@ -1,17 +1,19 @@
 VERSION := development
 GIT_REF := $(shell git log -1 --format=%H)
 GIT_AUTHOR := $(shell git log -1 --format=%an)
-GIT_PUBKEY := $(shell git log -1 --format=%GP)
+GIT_PUBKEY := $(shell git log -1 --format=%GK)
 GIT_TIMESTAMP := $(shell git log -1 --format=%cd --date=iso)
 export
 
 ## Use env vars from latest release when reproducing
 ifdef REPRODUCE
-include dist/release.env
-export
+	include dist/release.env
+	export
 endif
+
+## Prevents use of caching when building docker image
 ifdef NOCACHE
-NO_CACHE := --no-cache
+	NO_CACHE := --no-cache
 endif
 
 .DEFAULT_GOAL :=
@@ -71,7 +73,7 @@ vm: out/dev-shell.digest out/airgap.iso out/sdcard.img
 			-nographic; \
 		"
 
-## Signing, Verification, and Release Targets
+## Release, Signing, Verification, and Reproduction Targets
 
 .PHONY: clean
 clean: