$ git clone -n https://gitee.com/alpha-wang/nettle.git /var/lib/mock/dist-an23-build-357936-71155/root/chroot_tmpdir/scmroot/nettle
Cloning into '/var/lib/mock/dist-an23-build-357936-71155/root/chroot_tmpdir/scmroot/nettle'...
$ git fetch origin 4f51ac48eaa156c58e5eb2e6d60cca1861689c21:KOJI_FETCH_HEAD
From https://gitee.com/alpha-wang/nettle
 * [new ref]         4f51ac48eaa156c58e5eb2e6d60cca1861689c21 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f51ac4 download to 3.8.1