$ git clone -n https://src.fedoraproject.org/rpms/mingw-llvm.git /var/lib/mock/f41-build-side-1-2773670-32327/root/chroot_tmpdir/scmroot/mingw-llvm
Cloning into '/var/lib/mock/f41-build-side-1-2773670-32327/root/chroot_tmpdir/scmroot/mingw-llvm'...
$ git fetch origin bd5b7fe1fbee1f795dd621b4612858fc5f2d657e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-llvm
 * [new ref]         bd5b7fe1fbee1f795dd621b4612858fc5f2d657e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bd5b7fe Update to 19.1.0