在对 Yocto rocko 构建进行 bitbaking 时，我收到此错误：
WARNING: go-systemd-4+gitb4a58d95188dd092ae20072bac14cece0e67c388-r0 do_fetch: Failed to fetch URL git://github.com/coreos/go-systemd.git, attempting MIRRORS if available
ERROR: go-systemd-4+gitb4a58d95188dd092ae20072bac14cece0e67c388-r0 do_fetch: Fetcher failure: Unable to find revision b4a58d95188dd092ae20072bac14cece0e67c388 in branch master even from upstream
ERROR: go-systemd-4+gitb4a58d95188dd092ae20072bac14cece0e67c388-r0 do_fetch: Fetcher failure for URL: 'git://github.com/coreos/go-systemd.git'. Unable to fetch URL from any source.
ERROR: go-systemd-4+gitb4a58d95188dd092ae20072bac14cece0e67c388-r0 do_fetch: Function failed: base_do_fetch
ERROR: Logfile of failure stored in: /home/ubu/build/build-rpb/tmp-rpb-glibc/work/aarch64-linaro-linux/go-systemd/4+gitb4a58d95188dd092ae20072bac14cece0e67c388-r0/temp/log.do_fetch.3021
ERROR: Task (/home/ubu/build/build-rpb/conf/../../layers/meta-virtualization/recipes-devtools/go/go-systemd_git.bb:do_fetch) failed with exit code '1'
go-systemd_git.bb 文件：
DESCRIPTION = "Go bindings to systemd socket activation, …