fetch tests: add a test for clobbering tag behavior

diff --git a/t/t6010-merge-base.sh b/t/t6010-merge-base.sh
index 31db7b5f9125ed346450d7bfe29d8bb5fac0460a..aa2d360ce35940a176a0ef04ca7ba8560adefb23 100755 (executable)
--- a/t/t6010-merge-base.sh
+++ b/t/t6010-merge-base.sh
@@ -34,7 +34,7 @@ doit () {
 
        commit=$(echo $NAME | git commit-tree $T $PARENTS) &&
 
-       echo $commit >.git/refs/tags/$NAME &&
+       git update-ref "refs/tags/$NAME" "$commit" &&
        echo $commit
 }