Merge branch 'locate-autosign-key' into 'master'

Grab the the autosigner key for kernel shasums

See merge request gitlab-org/build/CNG!369

git-base/Dockerfile.build.ubi8

@@ -6,6 +6,7 @@ ARG GIT_VERSION=2.24.1
 
 RUN mkdir /assets \
     && curl https://mirrors.edge.kernel.org/pub/software/scm/git/sha256sums.asc -o sha256sums.asc \
+    && gpg2 --locate-keys autosigner@kernel.org \
     && gpg2 --auto-key-retrieve --verify sha256sums.asc \
     && curl https://mirrors.edge.kernel.org/pub/software/scm/git/git-${GIT_VERSION}.tar.gz -o git-${GIT_VERSION}.tar.gz \
     && grep -q $(sha256sum git-${GIT_VERSION}.tar.gz) sha256sums.asc \