diff --git a/config-prod.yml b/config-prod.yml
index 53f7c15..b2df56e 100644
--- a/config-prod.yml
+++ b/config-prod.yml
@@ -11,16 +11,19 @@ projects:
     rakudo:
         project: rakudo
         repo: rakudo
+        main: main
         slug: rakudo/rakudo
         install-id: 20243470
     nqp:
         project: Raku
         repo: nqp
+        main: main
         slug: Raku/nqp
         install-id: 20243470
     moar:
         project: MoarVM
         repo: MoarVM
+        main: master
         slug: MoarVM/MoarVM
         install-id: 20243470
 
diff --git a/lib/Config.rakumod b/lib/Config.rakumod
index 6a2e532..d27dfee 100644
--- a/lib/Config.rakumod
+++ b/lib/Config.rakumod
@@ -4,6 +4,7 @@ class ConfigProject {
     has $.project;
     has $.repo;
     has $.slug;
+    has $.main;
     has $.repo-url;
     has $.install-id;
 
@@ -12,6 +13,7 @@ class ConfigProject {
             project    => %config<project>,
             repo       => %config<repo>,
             slug       => %config<project> ~ "/" ~ %config<repo>,
+            main       => %config<main>,
             repo-url   => %config<repo-url>,
             install-id => %config<install-id>,
         ;
diff --git a/lib/SourceArchiveCreator.rakumod b/lib/SourceArchiveCreator.rakumod
index aecfaa6..0772bce 100644
--- a/lib/SourceArchiveCreator.rakumod
+++ b/lib/SourceArchiveCreator.rakumod
@@ -121,26 +121,26 @@ method create-archive(SourceSpec $source-spec --> Str) {
         }
 
         my @shas;
-        for $!rakudo-dir, $source-spec.rakudo-git-url, $source-spec.rakudo-commit-sha,
-                $!nqp-dir,    $source-spec.nqp-git-url, $source-spec.nqp-commit-sha,
-                $!moar-dir,   $source-spec.moar-git-url, $source-spec.moar-commit-sha
-                -> $repo-dir, $remote, $commit {
+        for $!rakudo-dir, $source-spec.rakudo-git-url, $source-spec.rakudo-commit-sha, config.projects.rakudo.main,
+                $!nqp-dir,    $source-spec.nqp-git-url, $source-spec.nqp-commit-sha, config.projects.nqp.main,
+                $!moar-dir,   $source-spec.moar-git-url, $source-spec.moar-commit-sha, config.projects.moar.main
+                -> $repo-dir, $remote, $commit, $main {
             debug "SourceArchiveCreator: working on " ~ $remote ~ " " ~ $commit;
+            my $tmp-branch = 'tmp-branch';
 
-            run(qw|git remote rm foobar|,
+            run(qw|git remote rm|, $tmp-branch,
                 :cwd($repo-dir), :merge).so;
 
-            validate run qw|git remote add foobar|, $remote,
+            validate run qw|git remote add|, $tmp-branch, $remote,
                 :cwd($repo-dir), :merge;
 
-            #validate run qw|git fetch foobar|, |($.fetch-ref ?? ("+refs/" ~ $.fetch-ref ~ ":refs/remotes/" ~ $.fetch-ref,) !! ()),
-            validate run qw|git fetch foobar|,
+            #validate run qw|git fetch|, $tmp-branch, |($.fetch-ref ?? ("+refs/" ~ $.fetch-ref ~ ":refs/remotes/" ~ $.fetch-ref,) !! ()),
+            validate run qw|git fetch|, $tmp-branch,
                 :cwd($repo-dir), :merge;
 
-            # TODO no hard coded master branch.
-            my $to-use = $commit eq 'LATEST' ?? 'foobar/master' !! $commit;
+            my $ref = $commit eq 'LATEST' ?? "$tmp-branch/$main" !! $commit;
 
-            validate run qw|git reset --hard|, $to-use,
+            validate run qw|git reset --hard|, $ref,
                 :cwd($repo-dir), :merge;
 
             # updating submodules
diff --git a/t/GitHubInterface.rakutest b/t/GitHubInterface.rakutest
index 0873116..0326994 100644
--- a/t/GitHubInterface.rakutest
+++ b/t/GitHubInterface.rakutest
@@ -20,7 +20,6 @@ check-mock($processor,
         $_.number == 3
         && $_.user-url eq "https://github.com/patrickbkr/GitHub-API-Testing/pull/3"
         && $_.comments[0].body eq "Some description."
-        && $_.head-url eq "https://github.com/patrickbkr/GitHub-API-Testing.git"
         && $_.base-url eq "https://github.com/patrickbkr/GitHub-API-Testing.git"
         && $_.head-branch eq "feature-branch-1"
         && $_.commit-task.commit-sha eq "f2b9e0fca8ad20c14bdc188240918720613d2cee"
diff --git a/t/data/config-test.yml b/t/data/config-test.yml
index c97a60d..c98b38a 100644
--- a/t/data/config-test.yml
+++ b/t/data/config-test.yml
@@ -11,16 +11,19 @@ projects:
     rakudo:
         project: rakudo
         repo: rakudo
+        main: main
         repo-url: https://github.com/rakudo/rakudo.git
         install-id: 20243470
     nqp:
         project: Raku
         repo: nqp
+        main: main
         repo-url: https://github.com/nqp/nqp.git
         install-id: 20243470
     moar:
         project: MoarVM
         repo: MoarVM
+        main: master
         repo-url: https://github.com/MoarVM/MoarVM.git
         install-id: 20243470