uboot fetch-error

[pawasthi]

Hello,

Repo init and repo sync was passed successfully. 
While generating the uboot image, the error is as follows.

$ bitbake u-boot-imx -c deploy
Loading cache: 100% |################################################################################################################| ETA: 00:00:00
Loaded 2840 entries from dependency cache.
Parsing recipes: 100% |##############################################################################################################| Time: 00:00:00
Parsing of 2262 .bb files complete (2260 cached, 2 parsed). 2839 targets, 433 skipped, 5 masked, 0 errors.
NOTE: Resolving any missing task queue dependencies

Build Configuration:
BB_VERSION = "1.30.0"
BUILD_SYS = "x86_64-linux"
NATIVELSBSTRING = "Ubuntu-16.04"
TARGET_SYS = "arm-poky-linux-gnueabi"
MACHINE = "imx6sx451"
DISTRO = "fsl-imx-fb"
DISTRO_VERSION = "4.1.15-2.1.0"
TUNE_FEATURES = "arm armv7a vfp neon callconvention-hard cortexa9"
TARGET_FPU = "hard"
meta
meta-poky = "HEAD:f5da2a5913319ad6ac2141438ba1aa17576326ab"
meta-oe
meta-multimedia = "HEAD:247b1267bbe95719cd4877d2d3cfbaf2a2f4865a"
meta-fsl-arm = "HEAD:be78894e4682f111575470fb23e51e6ba523508d"
meta-fsl-arm-extra = "HEAD:3dfb82fc7e703eae9891b3ffda0e9393701f2396"
meta-fsl-demos = "HEAD:a165068f8a0d1cf29aabe4b4053f28be1c2aa492"
meta-visteon-x451 = "HEAD:762ddb65933e625f66b9d39a0194cc07f238e041"
meta-visteon-middleware = "HEAD:699347a2a930f40ad96fc1ff372fcdf9433880cd"
meta-bsp
meta-sdk = "HEAD:823b26a67261270d2bf22d511e6190641a8a90cf"
meta-browser = "HEAD:77736988073a5d90fcff9d0005c8477332ede387"
meta-gnome
meta-networking
meta-python
meta-filesystems = "HEAD:247b1267bbe95719cd4877d2d3cfbaf2a2f4865a"
meta-qt5 = "HEAD:ccae79be69c5268df3b47e4e14cea0591c39a531"

NOTE: Preparing RunQueue
NOTE: Executing SetScene Tasks
NOTE: Executing RunQueue Tasks
WARNING: u-boot-imx-2016.03-r0 do_fetch: Failed to fetch URL git://source.codeaurora.org/external/imx/uboot-imx.git;protocol=https;branch=imx_v2016.03_4.1.15_2.0.0_ga, attempting MIRRORS if available
ERROR: u-boot-imx-2016.03-r0 do_fetch: Fetcher failure: Unable to find revision a57b13b942d59719e3621179e98bd8a0ab235088 in branch imx_v2016.03_4.1.15_2.0.0_ga even from upstream
ERROR: u-boot-imx-2016.03-r0 do_fetch: Function failed: Fetcher failure for URL: 'git://source.codeaurora.org/external/imx/uboot-imx.git;protocol=https;branch=imx_v2016.03_4.1.15_2.0.0_ga'. Unable to fetch URL from any source.
ERROR: Logfile of failure stored in: /home/mmk/pranshu/x451-yocto_V3.15/build/tmp/work/imx6sx451-poky-linux-gnueabi/u-boot-imx/2016.03-r0/temp/log.do_fetch.24933
ERROR: Task 2 (/home/mmk/pranshu/x451-yocto_V3.15/sources/poky/../meta-fsl-bsp-release/imx/meta-bsp/recipes-bsp/u-boot/u-boot-imx_2016.03.bb, do_fetch) failed with exit code '1'
NOTE: Tasks Summary: Attempted 233 tasks of which 226 didn't need to be rerun and 1 failed.
NOTE: Writing buildhistory
Waiting for 0 running tasks to finish:

Summary: 1 task failed:
/home/mmk/pranshu/x451-yocto_V3.15/sources/poky/../meta-fsl-bsp-release/imx/meta-bsp/recipes-bsp/u-boot/u-boot-imx_2016.03.bb, do_fetch
Summary: There was 1 WARNING message shown.
Summary: There were 2 ERROR messages shown, returning a non-zero exit code.