$ git clone -n https://src.fedoraproject.org/rpms/libmpcdec.git /var/lib/mock/f41-build-850531-165462/root/chroot_tmpdir/scmroot/libmpcdec
Cloning into '/var/lib/mock/f41-build-850531-165462/root/chroot_tmpdir/scmroot/libmpcdec'...
$ git fetch origin 82d881a0b6f1b7e960b0eb20c8e9e1374b632711:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libmpcdec
 * [new ref]         82d881a0b6f1b7e960b0eb20c8e9e1374b632711 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 82d881a Add upstream code fixes