diff --git a/src/libstore/build/hook-instance.cc b/src/libstore/build/hook-instance.cc
index 1f19ddccc..cb58a1f02 100644
--- a/src/libstore/build/hook-instance.cc
+++ b/src/libstore/build/hook-instance.cc
@@ -16,11 +16,11 @@ HookInstance::HookInstance()
     buildHookArgs.pop_front();
 
     Strings args;
+    args.push_back(std::string(baseNameOf(buildHook)));
 
     for (auto & arg : buildHookArgs)
         args.push_back(arg);
 
-    args.push_back(std::string(baseNameOf(settings.buildHook.get())));
     args.push_back(std::to_string(verbosity));
 
     /* Create a pipe to get the output of the child. */
diff --git a/src/nix/main.cc b/src/nix/main.cc
index aa1ad3e68..cc96a500c 100644
--- a/src/nix/main.cc
+++ b/src/nix/main.cc
@@ -267,7 +267,7 @@ void mainWrapped(int argc, char * * argv)
     programPath = argv[0];
     auto programName = std::string(baseNameOf(programPath));
 
-    if (argc > 0 && std::string_view(argv[0]) == "__build-remote") {
+    if (argc > 1 && std::string_view(argv[1]) == "__build-remote") {
         programName = "build-remote";
         argv++; argc--;
     }
diff --git a/tests/fetchGit.sh b/tests/fetchGit.sh
index 108be4c02..443e65f9c 100644
--- a/tests/fetchGit.sh
+++ b/tests/fetchGit.sh
@@ -24,12 +24,14 @@ touch $repo/.gitignore
 git -C $repo add hello .gitignore
 git -C $repo commit -m 'Bla1'
 rev1=$(git -C $repo rev-parse HEAD)
+git -C $repo tag -a tag1 -m tag1
 
 echo world > $repo/hello
 git -C $repo commit -m 'Bla2' -a
 git -C $repo worktree add $TEST_ROOT/worktree
 echo hello >> $TEST_ROOT/worktree/hello
 rev2=$(git -C $repo rev-parse HEAD)
+git -C $repo tag -a tag2 -m tag2
 
 # Fetch a worktree
 unset _NIX_FORCE_HTTP
@@ -218,6 +220,16 @@ rev4_nix=$(nix eval --impure --raw --expr "(builtins.fetchGit { url = \"file://$
 path9=$(nix eval --impure --raw --expr "(builtins.fetchGit { url = \"file://$repo\"; ref = \"HEAD\"; name = \"foo\"; }).outPath")
 [[ $path9 =~ -foo$ ]]
 
+# Specifying a ref without a rev shouldn't pick a cached rev for a different ref
+export _NIX_FORCE_HTTP=1
+rev_tag1_nix=$(nix eval --impure --raw --expr "(builtins.fetchGit { url = \"file://$repo\"; ref = \"refs/tags/tag1\"; }).rev")
+rev_tag1=$(git -C $repo rev-parse refs/tags/tag1)
+[[ $rev_tag1_nix = $rev_tag1 ]]
+rev_tag2_nix=$(nix eval --impure --raw --expr "(builtins.fetchGit { url = \"file://$repo\"; ref = \"refs/tags/tag2\"; }).rev")
+rev_tag2=$(git -C $repo rev-parse refs/tags/tag2)
+[[ $rev_tag2_nix = $rev_tag2 ]]
+unset _NIX_FORCE_HTTP
+
 # should fail if there is no repo
 rm -rf $repo/.git
 (! nix eval --impure --raw --expr "(builtins.fetchGit \"file://$repo\").outPath")