$ git clone -n https://src.fedoraproject.org/rpms/mingw-llvm.git /var/lib/mock/f41-build-731924-13178/root/chroot_tmpdir/scmroot/mingw-llvm
Cloning into '/var/lib/mock/f41-build-731924-13178/root/chroot_tmpdir/scmroot/mingw-llvm'...
$ git fetch origin 1b2065eb33391c22e8f0c9739ad60d27dfb97748:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-llvm
 * [new ref]         1b2065eb33391c22e8f0c9739ad60d27dfb97748 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1b2065e Update to 18.1.6