...
Fetching projects: 10% (46/455) Fetching project platform/system/keymaster
Fetching project platform/external/libcap-ng
Fetching project platform/packages/apps/Tag
Fetching project platform/external/sonivox
Fetching project platform/hardware/qcom/msm8x84
fatal: Couldn't find remote ref refs/tags/android-6.0.0_r24
Unexpected end of command stream
fatal: Couldn't find remote ref refs/tags/android-6.0.0_r24
Unexpected end of command stream
error: Cannot fetch platform/hardware/qcom/msm8x84
error: Exited sync due to fetch errors
$ repo init -u https://android.googlesource.com/platform/manifest -b android-6.0.0_r26 -g default,-qcom_msm8x84