$ git clone -n https://gitee.com/src-anolis-os/llvm15.git /var/lib/mock/dist-an23.2-build-433980-73078/root/chroot_tmpdir/scmroot/llvm15
Cloning into '/var/lib/mock/dist-an23.2-build-433980-73078/root/chroot_tmpdir/scmroot/llvm15'...
$ git fetch origin a23.2:KOJI_FETCH_HEAD
fatal: couldn't find remote ref a23.2
$ git reset --hard origin/a23.2
fatal: ambiguous argument 'origin/a23.2': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'