$ git clone -n https://gitee.com/fundawang/llvm15.git /var/lib/mock/dist-an23-build-235318-62751/root/chroot_tmpdir/scmroot/llvm15
Cloning into '/var/lib/mock/dist-an23-build-235318-62751/root/chroot_tmpdir/scmroot/llvm15'...
$ git reset --hard 0b42fcc4727ad3a2f3521d536b552fa32a767dce
HEAD is now at 0b42fcc Branch llvm to llvm15 for upgrades