$ git clone -n https://github.com/xcp-ng-rpms/kernel-alt.git /var/lib/mock/v8.1-testing-2707-2130/root/chroot_tmpdir/scmroot/kernel-alt
Cloning into '/var/lib/mock/v8.1-testing-2707-2130/root/chroot_tmpdir/scmroot/kernel-alt'...
$ git reset --hard 5f9f3c7fcf01650560a1d92e34aff00e567a529b
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HEAD is now at 5f9f3c7 Add build requires openssl-devel (#8)