Integrate branch jumping during git ps

Signed-off-by: Knut Ahlers <knut@ahlers.me>

bin/git-ps

@@ -1,10 +1,10 @@
 #!/bin/bash
-
+set -euo pipefail
-set -o pipefail
-set -e
 
 source "${HOME}/bin/script_framework.sh"
 
+jump_branch="${1:-}"
+
 step "Loading required keys to pull"
 git loadkey
 
@@ -14,6 +14,11 @@ for remote in $(git remote -v | awk '{print $1}' | sort | uniq); do
 	git fetch -p ${remote} --tags
 done
 
+[[ -z ${jump_branch} ]] || {
+	step "Switching to branch ${jump_branch}"
+	git checkout "${jump_branch}"
+}
+
 step "Rebasing branch / updating submodules..."
 git pull --rebase && git submodule update --init --recursive