AOSP Build Steps Using github.com/ayufan-rock64/android-7.1

[birender.s]

Please check sync error:

error: Cannot fetch all (GitError: all update-ref: fatal: 75b3f7059f1c495f74a8b1e9943a65e8121d13d8^0: not a valid SHA1
)
Fetching project device-rockchip-rk3328
Exception in thread Thread-270:
Traceback (most recent call last):
File "/usr/lib/python2.7/threading.py", line 801, in __bootstrap_inner
self.run()
File "/usr/lib/python2.7/threading.py", line 754, in run
self.__target(*self.__args, **self.__kwargs)
File "/home/user/aosp/ROCK64/android-7.1.2_r6/.repo/repo/subcmds/sync.py", line 270, in _FetchProjectList
success = self._FetchHelper(opt, project, *args, **kwargs)
File "/home/user/aosp/ROCK64/android-7.1.2_r6/.repo/repo/subcmds/sync.py", line 314, in _FetchHelper
prune=opt.prune)
File "/home/user/aosp/ROCK64/android-7.1.2_r6/.repo/repo/project.py", line 1271, in Sync_NetworkHalf
self._InitMRef()
File "/home/user/aosp/ROCK64/android-7.1.2_r6/.repo/repo/project.py", line 2364, in _InitMRef
self._InitAnyMRef(R_M + self.manifest.branch)
File "/home/user/aosp/ROCK64/android-7.1.2_r6/.repo/repo/project.py", line 2376, in _InitAnyMRef
self.bare_git.UpdateRef(ref, dst, message=msg, detach=True)
File "/home/user/aosp/ROCK64/android-7.1.2_r6/.repo/repo/project.py", line 2673, in UpdateRef
self.update_ref(*cmdv)
File "/home/user/aosp/ROCK64/android-7.1.2_r6/.repo/repo/project.py", line 2747, in runner
(self._project.name, name, p.stderr))
GitError: all update-ref: fatal: 75b3f7059f1c495f74a8b1e9943a65e8121d13d8^0: not a valid SHA1


Seems to be revision issue of:

<project clone-depth="1" name="all" path="vendor/opengapps/sources/all" remote="opengapps" revision="75b3f7059f1c495f74a8b1e9943a65e8121d13d8" upstream="master"/>