$ git clone -n https://src.fedoraproject.org/rpms/lldb.git /var/lib/mock/f41-build-side-1-3137959-39809/root/chroot_tmpdir/scmroot/lldb
Cloning into '/var/lib/mock/f41-build-side-1-3137959-39809/root/chroot_tmpdir/scmroot/lldb'...
$ git fetch origin 3f648580b10f807c421f0855204aeb0753c9ce26:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lldb
 * [new ref]         3f648580b10f807c421f0855204aeb0753c9ce26 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3f64858 Merged into llvm package