$ git clone -n https://src.fedoraproject.org/rpms/libmad.git /var/lib/mock/f42-build-side-1-3584359-46893/root/chroot_tmpdir/scmroot/libmad
Cloning into '/var/lib/mock/f42-build-side-1-3584359-46893/root/chroot_tmpdir/scmroot/libmad'...
$ git fetch origin acea9a88509628684ee14f66365618221f1b39d4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libmad
 * [new ref]         acea9a88509628684ee14f66365618221f1b39d4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at acea9a8 Try to fix cmake issue