checkout pull request hangs forever if the commands request interactive input

Type: Bug

When I run git commands that contact GitHub I (intermittently) get prompted first, like:

Warning: the ECDSA host key for 'github.com' differs from the key for the IP address '140.82.112.3'
Offending key for IP in /home/briantist/.ssh/known_hosts:30
Matching host key in /home/briantist/.ssh/known_hosts:265
Are you sure you want to continue connecting (yes/no)?

I need to answer this before the command continues.

When using the "checkout pull request" feature in the extension, it sometimes works, or sometimes never completes at one of the steps it performs, often the "fetch" step, because the underlying command has an interactive prompt and the extension doesn't know how to deal with it.

I can request checkout of the PR again through the extension, and the messages will keep piling up unless one of them happens to hit an IP I already allowed.

There is no way to tell the extension to cancel the request, the only thing I've found that at least makes the message go away is to reload the entire window.

note: I understand the underlying reason for my specific prompt and have resolved it, but the issue of the extension not knowing what to do with it and requiring a reload is still a problem

Extension version: 0.66.2
VS Code version: Code 1.79.2 (695af097c7bd098fbf017ce3ac85e09bbc5dda06, 2023-06-14T08:57:04.379Z)
OS version: Windows_NT x64 10.0.19044
Modes:
Remote OS version: Linux x64 5.15.90.1-microsoft-standard-WSL2

vsliv368:30146709
vsreu685:30147344
python383:30185418
vspor879:30202332
vspor708:30202333
vspor363:30204092
vslsvsres303:30308271
vserr242cf:30382550
pythontb:30283811
vsjup518:30340749
pythonptprofiler:30281270
vshan820:30294714
vstes263:30335439
vscoreces:30445986
vscod805cf:30301675
binariesv615:30325510
bridge0708:30335490
bridge0723:30353136
vsaa593cf:30376535
pythonvs932:30410667
py29gd2263:30776702
vscaat:30438848
vsclangdf:30486550
c4g48928:30535728
dsvsc012:30540252
pynewext54:30695312
azure-dev_surveyone:30548225
282f8724:30602487
pyind779:30671433
f6dab269:30613381
pythonsymbol12:30671437
showlangstatbar:30737416
vsctsb:30748421
pythonms35:30701012
03d35959:30757346
57b77579:30736110
pythonfmttext:30731395
pythoncmvfstrcf:30756944
fixshowwlkth:30771522
pythongtdpath:30769146
i26e3531:30780429
pythonnosm12tcf:30779713
pythonidxpt:30772539
pythonnocebcf:30776496

从 checkout pull request 流程及其 fetch 步骤开始，然后追踪交互式 Git 命令的启动和呈现方式。完成的标准是：交互式提示不再让请求一直挂起，并且扩展提供一种无需重新加载窗口即可处理或取消该提示的方式。