Unable to add repository from a github branch containing slash

[lupusbytes]

Describe the issue you are experiencing

An add-on repository can be added from a custom branch like
https://github.com/username/repo#branch

I couldn't get this doesn't work when the branch contains a slash like
https://github.com/username/repo#feature/hot-new-stuff

In case it's not just a problem with my setup, I believe this to be a bug.
It's common for projects to prefix their branches with fix/ or feature/ and it should be supported.

What type of installation are you running?

Home Assistant OS

Which operating system are you running on?

Home Assistant Operating System

Steps to reproduce the issue

1. Go to App store
2. Click the three dots in the top right corner
3. Click repositories
4. Add https://github.com/username/repo#feature/hot-new-stuff

Anything in the Supervisor logs that might be useful for us?

No

System information

System Information

version	core-2026.2.1
installation_type	Home Assistant OS
dev	false
hassio	true
docker	true
container_arch	amd64
user	root
virtualenv	false
python_version	3.13.11
os_name	Linux
os_version	6.12.63-haos
arch	x86_64
timezone	Asia/Dubai
config_dir	/config

Home Assistant Cloud

logged_in	false
can_reach_cert_server	ok
can_reach_cloud_auth	ok
can_reach_cloud	ok

Home Assistant Supervisor

host_os	Home Assistant OS 17.0
update_channel	stable
supervisor_version	supervisor-2026.01.1
agent_version	1.8.1
docker_version	29.1.3
disk_total	30.8 GB
disk_used	7.2 GB
nameservers	1.1.1.1
healthy	true
supported	true
host_connectivity	true
supervisor_connectivity	true
ntp_synchronized	true
virtualization	kvm
board	ova
supervisor_api	ok
version_api	ok
installed_addons	Advanced SSH & Web Terminal (23.0.2), cs2mqtt (supervisor-integration)

Dashboards

dashboards	2
resources	0
views	0
mode	storage

Network Configuration

adapters	lo (disabled), enp1s0 (enabled, default, auto), docker0 (disabled), hassio (disabled), veth90bc2cd (disabled), veth4fcf1e5 (disabled), veth43a046c (disabled), veth29f040d (disabled), veth668c745 (disabled), veth846a490 (disabled), vethea3adaf (disabled), vethe91560e (disabled)
ipv4_addresses	lo (127.0.0.1/8), enp1s0 (10.0.0.100/24), docker0 (172.30.232.1/23), hassio (172.30.32.1/23), veth90bc2cd (), veth4fcf1e5 (), veth43a046c (), veth29f040d (), veth668c745 (), veth846a490 (), vethea3adaf (), vethe91560e ()
ipv6_addresses	lo (::1/128), enp1s0 (fe80::8b98:396e:3acd:2bcc/64), docker0 (fe80::18b8:5fff:fedc:89e6/64), hassio (fd0c:ac1e:2100::1/48, fe80::1c38:a2ff:fe1f:1115/64), veth90bc2cd (fe80::a4f8:b8ff:feb3:c475/64), veth4fcf1e5 (fe80::6c4f:42ff:fe57:96e5/64), veth43a046c (fe80::dcd4:e9ff:fefd:891f/64), veth29f040d (fe80::7c9c:91ff:fe26:f58d/64), veth668c745 (fe80::80dd:d2ff:fe03:9500/64), veth846a490 (fe80::2cbd:c6ff:fed3:5390/64), vethea3adaf (fe80::5cb7:5bff:fe02:4870/64), vethe91560e (fe80::1059:bbff:fecd:a0ee/64)
announce_addresses	10.0.0.100, fe80::8b98:396e:3acd:2bcc

Recorder

oldest_recorder_run	January 24, 2026 at 2:10 PM
current_recorder_run	February 7, 2026 at 5:58 PM
estimated_db_size	0.73 MiB
database_engine	sqlite
database_version	3.49.2

Supervisor diagnostics

No response

Additional information

No response