$ git clone -n https://src.fedoraproject.org/rpms/mingw-llvm.git /var/lib/mock/f41-build-830060-156314/root/chroot_tmpdir/scmroot/mingw-llvm
Cloning into '/var/lib/mock/f41-build-830060-156314/root/chroot_tmpdir/scmroot/mingw-llvm'...
$ git fetch origin adc7be538ea3da000d858a1d99995b8bb7cae347:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-llvm
 * [new ref]         adc7be538ea3da000d858a1d99995b8bb7cae347 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at adc7be5 Fix lib ver