$ git clone -n git+ssh://git@codeup.openanolis.cn/codeup/anolis-os/gstreamer1-plugins-ugly-free.git /var/lib/mock/dist-an7-build-27924-15211/root/chroot_tmpdir/scmroot/gstreamer1-plugins-ugly-free
Cloning into '/var/lib/mock/dist-an7-build-27924-15211/root/chroot_tmpdir/scmroot/gstreamer1-plugins-ugly-free'...
Host key verification failed.
fatal: Could not read from remote repository.

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and the repository exists.