build: Configure private repos to be fetched via Git instead of Go proxy

.github/workflows/hydrun.yaml

@@ -15,13 +15,16 @@ jobs:
     strategy:
       matrix:
         target:
+          # Tests
           - id: test
             src: .
             os: golang:bookworm
             flags: -e '-v /tmp/ssh-key:/tmp/ssh-key'
             cmd: GOFLAGS="-short" ./Hydrunfile test
             dst: out/nonexistent
             runner: depot-ubuntu-22.04-32
+
+          # Binaries
           - id: go.drafter-nat
             src: .
             os: golang:bookworm
@@ -92,6 +95,7 @@ jobs:
             cmd: ./Hydrunfile go drafter-terminator
             dst: out/*
             runner: depot-ubuntu-22.04-32
+
 
     steps:
       - name: Maximize build space

Hydrunfile

@@ -7,9 +7,12 @@ if [ "$1" = "test" ]; then
     # Configure SSH access
     eval "$(ssh-agent -s)"
     ssh-add /tmp/ssh-key
+    mkdir -p ~/.ssh
+    ssh-keyscan github.com >>~/.ssh/known_hosts
 
     # Configure Git
     git config --global --add safe.directory '*'
+    git config --global url."ssh://git@github.com/".insteadOf "https://github.com/"
 
     # Generate dependencies
     make depend
@@ -25,6 +28,8 @@ if [ "$1" = "go" ]; then
     # Configure SSH access
     eval "$(ssh-agent -s)"
     ssh-add /tmp/ssh-key
+    mkdir -p ~/.ssh
+    ssh-keyscan github.com >>~/.ssh/known_hosts
 
     # Install native dependencies
     apt update
@@ -36,6 +41,7 @@ if [ "$1" = "go" ]; then
 
     # Configure Git
     git config --global --add safe.directory '*'
+    git config --global url."ssh://git@github.com/".insteadOf "https://github.com/"
 
     # Generate dependencies
     make depend