$ git clone -n https://gitee.com/src-anolis-os/nss-altfiles.git /var/lib/mock/dist-an7_9-updates-build-190203-60696/root/chroot_tmpdir/scmroot/nss-altfiles
Cloning into '/var/lib/mock/dist-an7_9-updates-build-190203-60696/root/chroot_tmpdir/scmroot/nss-altfiles'...
$ git fetch origin c6f3ddeb7407316362c7cf1b7b764f2db90e4eac:KOJI_FETCH_HEAD
From https://gitee.com/src-anolis-os/nss-altfiles
 * [new ref]         c6f3ddeb7407316362c7cf1b7b764f2db90e4eac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6f3dde import nss-altfiles-2.18.1-12.el8.src.rpm