[ "$LOCKPID" = $PPID ] || { echo "Repository entered from another vcsh instance. Aborting." 1>&2; exit 1; }
: "${XDG_CONFIG_HOME:="$HOME/.config"}"
-. "$XDG_CONFIG_HOME/vcsh/hooks-available/sparse-checkout.sh"
-git read-tree -mu HEAD
+
+# shellcheck source=/dev/null
+. "$XDG_CONFIG_HOME/vcsh/hooks-available/enable-sparse-checkout.sh"
+
+# Verify if the current branch is valid before updating the working tree.
+# This avoids errors with empty repositories which would only confuse the
+# user.
+if git rev-parse --verify HEAD >/dev/null 2>&1;
+then
+ git read-tree -mu HEAD
+fi
# Unlock the working tree.
rm -rf "$LOCKDIR"